21122002220031 has 24 divisors (see below), whose sum is σ = 31569784253280. Its totient is φ = 13592251409856.

The previous prime is 21122002220023. The next prime is 21122002220051. The reversal of 21122002220031 is 13002220022112.

21122002220031 is a `hidden beast` number, since 211 + 2 + 200 + 2 + 220 + 0 + 31 = 666.

It is not a de Polignac number, because 21122002220031 - 2³ = 21122002220023 is a prime.

It is a super-2 number, since 2×21122002220031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122002219986 and 21122002220013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122002220021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9466416 + ... + 11482901.

It is an arithmetic number, because the mean of its divisors is an integer number (1315407677220).

Almost surely, 2^{21122002220031} is an apocalyptic number.

21122002220031 is a deficient number, since it is larger than the sum of its proper divisors (10447782033249).

21122002220031 is a wasteful number, since it uses less digits than its factorization.

21122002220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20953215 (or 20953212 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21122002220031 its reverse (13002220022112), we get a palindrome (34124222242143).

The spelling of 21122002220031 in words is "twenty-one trillion, one hundred twenty-two billion, two million, two hundred twenty thousand, thirty-one".