Undecillion? That was the first time I had heard that “number.” When searching the definition, some were vague and undecillion basically means a number with a LOT of zeros behind it. Technically, I found the definition to be:
The cardinal number equal to 10 to the 36th power.
Chiefly British. The cardinal number equal to 10 to the 66th power.
LOL… when I was young, a zillion was big! Not anymore.