125230700521 has 4 divisors (see below), whose sum is σ = 125262659200. Its totient is φ = 125198741844.

The previous prime is 125230700479. The next prime is 125230700537. The reversal of 125230700521 is 125007032521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125230700521 - 2⁹ = 125230700009 is a prime.

It is the 353880-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125230700521.

It is not an unprimeable number, because it can be changed into a prime (125230700561) by changing a digit.

It is a nontrivial repunit in base 353879.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15973461 + ... + 15981298.

It is an arithmetic number, because the mean of its divisors is an integer number (31315664800).

Almost surely, 2^125230700521 is an apocalyptic number.

It is an amenable number.

125230700521 is a deficient number, since it is larger than the sum of its proper divisors (31958679).

125230700521 is an equidigital number, since it uses as much as digits as its factorization.

125230700521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31958678.

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 125230700521 in words is "one hundred twenty-five billion, two hundred thirty million, seven hundred thousand, five hundred twenty-one".