Zillion is not actually a real number; it's simply a term used to refer to an undetermined but extremely large quantity
Approximately the base ten logarithm of a zillion.
10^6: million
10^9: billion
10^12: trillion
10^15: quadrillion
10^18: quintillion
10^21: sextillion
10^24: septillion
10^27: octillion
10^30: nonillion
10^33: decillion
10^36: ???
You can call anything greater than 10^36 “zillion”.
