What the hell is a googolplex??

In mathematics, a googolplex is a number starting with 1 and followed by a googol zeroes. Does that definition help? At least it narrows it down to "a number". Now the question is "what the hell is a googol?"
A googol is a number starting with 1 and followed by 100 zeroes. People like me would simply call it "a zillion" or "a gazillion" :p But the question would be from what number I call something a gazillion. Anyways, googolplex and googol are real words.

And by now, maybe you are wondering if a googol and the famous search engine Google are related. Actually, the name Google is a misspelling of the word googol. But now, the verb "to google" has even been included in the Merriam Webster Collegiate Dictionary and in the Oxford English Dictionary:

to use the Google search engine to obtain information about (as a person) on the World Wide Web

Today, Google is 10 years old.

-Javier