125200522421 has 16 divisors (see below), whose sum is σ = 142804638144. Its totient is φ = 108739455744.

The previous prime is 125200522393. The next prime is 125200522457. The reversal of 125200522421 is 124225002521.

It is a cyclic number.

It is not a de Polignac number, because 125200522421 - 2³⁰ = 124126780597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125200522621) 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, 684506 + ... + 847908.

It is an arithmetic number, because the mean of its divisors is an integer number (8925289884).

Almost surely, 2^125200522421 is an apocalyptic number.

It is an amenable number.

125200522421 is a deficient number, since it is larger than the sum of its proper divisors (17604115723).

125200522421 is a wasteful number, since it uses less digits than its factorization.

125200522421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166900.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 125200522421 its reverse (124225002521), we get a palindrome (249425524942).

The spelling of 125200522421 in words is "one hundred twenty-five billion, two hundred million, five hundred twenty-two thousand, four hundred twenty-one".