In 1976 I learned what a “googol” was from a comic book, and the way it was presented as part of a clever mystery cemented its meaning in my mind. See the panels below for why the villain called himself the “Googol”.
21 years later a couple of Stanford graduate students registered a domain name for their new search engine, but they misspelled the name Googol. Google.com was born!
Later Google registered the domain 1e100.net - the number 1 followed by 100 zeros. A googol. If you do a lot of packet analysis, you have probably seen a fair amount of traffic to hosts in this domain.