Icosillion

The icosillion (also called icocillion or ducontillion ) is equal to \(10^{3\left(10^{60}\right)+3}\) or \(10^{3\text{ novemdecillion }3}\). The term was coined by Jonathan Bowers. It is 3×1060+4 digits long.

Icosillion is also known as one millia^20tillion according to Landon Curt Noll's The English name of a number.

Etymology
The name of this number is based on the suffix "-illion" and the prefix "icosa-" (from Greek 20).