31122022117 has 2 divisors, whose sum is σ = 31122022118. Its totient is φ = 31122022116.

The previous prime is 31122022081. The next prime is 31122022123. The reversal of 31122022117 is 71122022113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27486655681 + 3635366436 = 165791^2 + 60294^2 .

It is a cyclic number.

It is not a de Polignac number, because 31122022117 - 2⁷ = 31122021989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122022147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561011058 + 15561011059.

It is an arithmetic number, because the mean of its divisors is an integer number (15561011059).

Almost surely, 2^31122022117 is an apocalyptic number.

It is an amenable number.

31122022117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122022117 is an equidigital number, since it uses as much as digits as its factorization.

31122022117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The spelling of 31122022117 in words is "thirty-one billion, one hundred twenty-two million, twenty-two thousand, one hundred seventeen".