31120023102131 has 16 divisors (see below), whose sum is σ = 33841871044704. Its totient is φ = 28497236673024.

The previous prime is 31120023102053. The next prime is 31120023102137. The reversal of 31120023102131 is 13120132002113.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31120023102131 - 2³⁸ = 30845145195187 is a prime.

It is a super-2 number, since 2×31120023102131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31120023102137) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31448996 + ... + 32423438.

It is an arithmetic number, because the mean of its divisors is an integer number (2115116940294).

Almost surely, 2^{31120023102131} is an apocalyptic number.

31120023102131 is a deficient number, since it is larger than the sum of its proper divisors (2721847942573).

31120023102131 is a wasteful number, since it uses less digits than its factorization.

31120023102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025270.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31120023102131 its reverse (13120132002113), we get a palindrome (44240155104244).

The spelling of 31120023102131 in words is "thirty-one trillion, one hundred twenty billion, twenty-three million, one hundred two thousand, one hundred thirty-one".