125431525221 has 16 divisors (see below), whose sum is σ = 177521424768. Its totient is φ = 78505856000.

The previous prime is 125431525207. The next prime is 125431525231. The reversal of 125431525221 is 122525134521.

It is a cyclic number.

It is not a de Polignac number, because 125431525221 - 2¹⁴ = 125431508837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125431525201) 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, 3046185 + ... + 3087086.

It is an arithmetic number, because the mean of its divisors is an integer number (11095089048).

Almost surely, 2^125431525221 is an apocalyptic number.

It is an amenable number.

125431525221 is a deficient number, since it is larger than the sum of its proper divisors (52089899547).

125431525221 is a wasteful number, since it uses less digits than its factorization.

125431525221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133692.

The product of its digits is 24000, while the sum is 33.

Adding to 125431525221 its reverse (122525134521), we get a palindrome (247956659742).

The spelling of 125431525221 in words is "one hundred twenty-five billion, four hundred thirty-one million, five hundred twenty-five thousand, two hundred twenty-one".