125021082917 has 2 divisors, whose sum is σ = 125021082918. Its totient is φ = 125021082916.

The previous prime is 125021082883. The next prime is 125021083037. The reversal of 125021082917 is 719280120521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102624763201 + 22396319716 = 320351^2 + 149654^2 .

It is a cyclic number.

It is not a de Polignac number, because 125021082917 - 2³⁰ = 123947341093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125021082817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62510541458 + 62510541459.

It is an arithmetic number, because the mean of its divisors is an integer number (62510541459).

Almost surely, 2^125021082917 is an apocalyptic number.

It is an amenable number.

125021082917 is a deficient number, since it is larger than the sum of its proper divisors (1).

125021082917 is an equidigital number, since it uses as much as digits as its factorization.

125021082917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 38.

The spelling of 125021082917 in words is "one hundred twenty-five billion, twenty-one million, eighty-two thousand, nine hundred seventeen".