31311021130139 has 2 divisors, whose sum is σ = 31311021130140. Its totient is φ = 31311021130138.

The previous prime is 31311021130121. The next prime is 31311021130163. The reversal of 31311021130139 is 93103112011313.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31311021130139 is a prime.

It is not a weakly prime, because it can be changed into another prime (31311021130189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655510565069 + 15655510565070.

It is an arithmetic number, because the mean of its divisors is an integer number (15655510565070).

Almost surely, 2^{31311021130139} is an apocalyptic number.

31311021130139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311021130139 is an equidigital number, since it uses as much as digits as its factorization.

31311021130139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The spelling of 31311021130139 in words is "thirty-one trillion, three hundred eleven billion, twenty-one million, one hundred thirty thousand, one hundred thirty-nine".