Kasner also coined the term googolplex. And how many zeros in 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 1010^100.
Is Googolplexian bigger than googolplex?
A Googolplex is defined as 10Googol. A Googolplexian is defined as 10Googolplex.
Has anyone counted googolplex?
No. By definition, for a computer to "count" to 2googol means you would need a googol bits. As a googol is larger than the number of atoms in the observable universe.