125231106721 has 16 divisors (see below), whose sum is σ = 149401154304. Its totient is φ = 102634608384.

The previous prime is 125231106683. The next prime is 125231106731. The reversal of 125231106721 is 127601132521.

It is a de Polignac number, because none of the positive numbers 2^k-125231106721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125231106731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276205 + ... + 571621.

It is an arithmetic number, because the mean of its divisors is an integer number (9337572144).

Almost surely, 2^125231106721 is an apocalyptic number.

It is an amenable number.

125231106721 is a deficient number, since it is larger than the sum of its proper divisors (24170047583).

125231106721 is a wasteful number, since it uses less digits than its factorization.

125231106721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298080.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 125231106721 in words is "one hundred twenty-five billion, two hundred thirty-one million, one hundred six thousand, seven hundred twenty-one".