21222113110120 has 64 divisors (see below), whose sum is σ = 51423368850000. Its totient is φ = 7835772377088.

The previous prime is 21222113110111. The next prime is 21222113110199. The reversal of 21222113110120 is 2101131122212.

It can be written as a sum of positive squares in 8 ways, for example, as 22516202916 + 21199596907204 = 150054^2 + 4604302^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68354596 + ... + 68664364.

Almost surely, 2^{21222113110120} is an apocalyptic number.

21222113110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222113110120 is an abundant number, since it is smaller than the sum of its proper divisors (30201255739880).

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

21222113110120 is a wasteful number, since it uses less digits than its factorization.

21222113110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441542 (or 441538 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21222113110120 its reverse (2101131122212), we get a palindrome (23323244232332).

The spelling of 21222113110120 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred thirteen million, one hundred ten thousand, one hundred twenty".