125109085931 has 2 divisors, whose sum is σ = 125109085932. Its totient is φ = 125109085930.

The previous prime is 125109085877. The next prime is 125109085973. The reversal of 125109085931 is 139580901521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125109085931 - 2¹⁸ = 125108823787 is a prime.

It is a super-2 number, since 2×125109085931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125109085331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62554542965 + 62554542966.

It is an arithmetic number, because the mean of its divisors is an integer number (62554542966).

Almost surely, 2^125109085931 is an apocalyptic number.

125109085931 is a deficient number, since it is larger than the sum of its proper divisors (1).

125109085931 is an equidigital number, since it uses as much as digits as its factorization.

125109085931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 125109085931 in words is "one hundred twenty-five billion, one hundred nine million, eighty-five thousand, nine hundred thirty-one".