220021221210100 has 72 divisors (see below), whose sum is σ = 478056191820480. Its totient is φ = 87896029105920.

The previous prime is 220021221210061. The next prime is 220021221210113. The reversal of 220021221210100 is 1012122120022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2772160617 + ... + 2772239983.

It is an arithmetic number, because the mean of its divisors is an integer number (6639669330840).

Almost surely, 2^{220021221210100} is an apocalyptic number.

220021221210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021221210100 is an abundant number, since it is smaller than the sum of its proper divisors (258034970610380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220021221210100 is a wasteful number, since it uses less digits than its factorization.

220021221210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114457 (or 114450 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220021221210100 its reverse (1012122120022), we get a palindrome (221033343330122).

The spelling of 220021221210100 in words is "two hundred twenty trillion, twenty-one billion, two hundred twenty-one million, two hundred ten thousand, one hundred".