If the universe were packed solid with neutrons, say, so there was no empty space anywhere, there would still only be about 10128 particles in it, quite a bit more than a googol but trivially small compared to a googolplex.
the number 10100, written as 1 followed by 100 zeros
Hyphenation
the num·ber 10100, writ·ten as 1 followed by 100 zeros