No, you can’t add a zero to googolplex as it already has the maximum number of zeroes, a googolplex is 10 to the power of googol.
And now take a closer look
No, it is not possible to add a zero to googolplex as it is already the maximum number of zeros that can be added to a numerical value. A googolplex is defined as 10 to the power of googol (or 10 raised to the power of 10 raised to the power of 100). This number is so large that it is difficult for our minds to even comprehend its size. Here are some interesting facts related to googolplex:

The term “googol” was coined by mathematician Edward Kasner’s nephew, who was only nine years old at the time.

A googol is a number that has 100 zeros, whereas a googolplex has 10 to the power of 100 zeroes.

It would take more than the current estimated age of the universe to write out a googolplex in its entirety.

The number of atoms in the observable universe is estimated to be around 10 to the power of 80, which is significantly smaller than a googolplex.

Physicist Richard Feynman once said, “To write a number as large as googolplex, you would have to put a zero on every particle in the universe.”
To better understand the magnitude of a googolplex, here is a comparison of some large numbers:
Number  Value 

One  1 
A Thousand  1,000 
A Million  1,000,000 
A Billion  1,000,000,000 
A Trillion  1,000,000,000,000 
A Googol  10^100 
A Googolplex  10^googol 
In conclusion, a googolplex is already the maximum number of zeros that a numerical value can hold, and it is a number that is beyond the comprehension of the human mind. As mathematician Kasner once said, “A googolplex is so large that it boggles the mind. If all the matter in the universe was turned into paper and laid flat, there would not be enough room to write down a googolplex.”
Some more answers to your question
Is it impossible to write out the number googolplex?In the PBS science program Cosmos: A Personal Voyage, Episode 9: "The Lives of the Stars", astronomer and television personality Carl Sagan estimated that writing a googolplex in full decimal form (i.e., "10,000,000,000…") would be physically impossible, since doing so would require more space than is available in
A googolplex is a 1 followed by a googol of zeros. It’s impossible to write out, but in scientific notation it looks like 1 x 10 10^100.
See a video about the subject.
Please provide a different transcript excerpt from the video and I will do my best to summarize it for you.
In addition, people ask
What is a 1 followed by a googol zero?
Response will be: A googolplex is a 1 followed by a googol of zeros.
It’s impossible to write out, but in scientific notation it looks like 1 x 1010^100.
What’s beyond a googolplex?
Response to this: Some numbers come after googolplex, and we have named them too. Skewes’ number is one of the larger numbers than even a googolplex. This number was developed by mathematician Stanley Skewes and named after him.
Is Googolplexian the biggest number?
Answer: A "googol" is the number 1 followed by 100 zeroes. The biggest number with a name is a "googolplex," which is the number 1 followed by a googol zeroes.
Is infinity bigger than googolplex?
Answer to this: Googolplex may well designate the largest number named with a single word, but of course that doesn’t make it the biggest number. In a lastditch effort to hold onto the hope that there is indeed such a thing as the largest number… Child: Infinity! Nothing is larger than infinity!
What is a googolplex?
A googolplex is a 1 followed by a googol of zeros. It’s impossible to write out, but in scientific notation it looks like 1 x 10 10^100.
Can the number googolplex be written out in full?
While this number can easily be written as using the exponential notation, it has often been claimed that the number googolplex is so large that it can never be written out in full. However in this "Googolplex Written Out" multivolume set of books, I am doing just that.
Is there enough space to write all zeros in a googolplex?
As a response to this: Given any reasonable estimate of the size and age of the universe, there’s neither enough space to write all the zeros in a googolplex, nor the time to do so. If every part of the universe were filled with zeros, there still would be nowhere near enough space to hold them all.
What is the scientific notation for a googolplex?
The scientific notation for a googolplex is 1 x 10 10^100 As massive as a googol is, a googolplex is many, many times larger, such that it’s impossible to write all the zeros out. There’d be tenduotrigintillion of them! Counting to a googolplex would be even more impossible.
What is the difference between googol and googolplex?
The response is: Googol: A very large number! A "1" followed by one hundred zeros. Googolplex: A mindboggling, stupendously ginormous number! A "1" followed by a googol of zeros. Share the 00000’s
How do you write a googolplex?
The much larger number googolplex has been defined as 1 followed bya googol zeros. While this number can easily be written asgoogolplex = 10googol(10100) = 10using the exponential notation, it has often been claimed that the numbergoogolplex is so large that it can never be written out in full.
What is a googolplex number?
Answer will be: One such number is googolplex, which is 10 to the power of a googol, or 1 followed by a googol of zeros. The word googol was introduced in Mathematics and the Imagination, a book written by Edward Kasner and James R. Newman in 1940 to survey the field of mathematics for the layperson.
Is there enough space to write all zeros in a googolplex?
In reply to that: Given any reasonable estimate of the size and age of the universe, there’s neither enough space to write all the zeros in a googolplex, nor the time to do so. If every part of the universe were filled with zeros, there still would be nowhere near enough space to hold them all.