125117112661 has 2 divisors, whose sum is σ = 125117112662. Its totient is φ = 125117112660.

The previous prime is 125117112641. The next prime is 125117112709. The reversal of 125117112661 is 166211711521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63004012036 + 62113100625 = 251006^2 + 249225^2 .

It is a cyclic number.

It is not a de Polignac number, because 125117112661 - 2³⁵ = 90757374293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125117112611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62558556330 + 62558556331.

It is an arithmetic number, because the mean of its divisors is an integer number (62558556331).

Almost surely, 2^125117112661 is an apocalyptic number.

It is an amenable number.

125117112661 is a deficient number, since it is larger than the sum of its proper divisors (1).

125117112661 is an equidigital number, since it uses as much as digits as its factorization.

125117112661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 34.

The spelling of 125117112661 in words is "one hundred twenty-five billion, one hundred seventeen million, one hundred twelve thousand, six hundred sixty-one".