👉 In mathematics, "zillions" is a term used to describe large numbers. It refers to a number that is so large that it can be expressed as an infinite decimal or fraction. For example, 10^100 (or any other positive integer) would be considered a zillion. The concept of a zillion arises from the idea that a million is equal to one billion divided by ten. Therefore, a thousand is equal to two million divided by ten and so on.