Helen Arney sings the Googol Song, with mathematical assistance from Matt Parker. A Googol is a large number (the digit 1 followed by 100 zeroes). A Googolplex is… too big to think about. It’s 10 to the power of 10 to the power of 100, or 10 to the power of Googol. That’s rather large. To learn more about Googol and Googolplex, Numberphile have a handy video explaining each.
I can sing a googol. Onwards!