21022111122120 has 96 divisors (see below), whose sum is σ = 68322882508920. Its totient is φ = 5605812495360.

The previous prime is 21022111122037. The next prime is 21022111122149. The reversal of 21022111122120 is 2122111122012.

21022111122120 is a `hidden beast` number, since 210 + 2 + 211 + 1 + 1 + 221 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8731351272996 + 12290759849124 = 2954886^2 + 3505818^2 .

It is a super-2 number, since 2×21022111122120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21022111122093 and 21022111122102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25878940 + ... + 26678900.

Almost surely, 2^{21022111122120} is an apocalyptic number.

21022111122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022111122120 is an abundant number, since it is smaller than the sum of its proper divisors (47300771386800).

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

21022111122120 is a wasteful number, since it uses less digits than its factorization.

21022111122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872975 (or 872968 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21022111122120 its reverse (2122111122012), we get a palindrome (23144222244132).

The spelling of 21022111122120 in words is "twenty-one trillion, twenty-two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty".