31130122091 has 2 divisors, whose sum is σ = 31130122092. Its totient is φ = 31130122090.

The previous prime is 31130122073. The next prime is 31130122157. The reversal of 31130122091 is 19022103113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31130122091 - 2¹⁴ = 31130105707 is a prime.

It is not a weakly prime, because it can be changed into another prime (31130122031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565061045 + 15565061046.

It is an arithmetic number, because the mean of its divisors is an integer number (15565061046).

Almost surely, 2^31130122091 is an apocalyptic number.

31130122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130122091 is an equidigital number, since it uses as much as digits as its factorization.

31130122091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 31130122091 in words is "thirty-one billion, one hundred thirty million, one hundred twenty-two thousand, ninety-one".