31122130957 has 2 divisors, whose sum is σ = 31122130958. Its totient is φ = 31122130956.

The previous prime is 31122130937. The next prime is 31122131039. The reversal of 31122130957 is 75903122113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16685147241 + 14436983716 = 129171^2 + 120154^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122130957 - 2³¹ = 28974647309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122130937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561065478 + 15561065479.

It is an arithmetic number, because the mean of its divisors is an integer number (15561065479).

Almost surely, 2^31122130957 is an apocalyptic number.

It is an amenable number.

31122130957 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122130957 is an equidigital number, since it uses as much as digits as its factorization.

31122130957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The spelling of 31122130957 in words is "thirty-one billion, one hundred twenty-two million, one hundred thirty thousand, nine hundred fifty-seven".