125131202131521 has 32 divisors (see below), whose sum is σ = 185649605589888. Its totient is φ = 74615152389120.

The previous prime is 125131202131469. The next prime is 125131202131567.

125131202131521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 125131202131521 - 2¹¹ = 125131202129473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125131202131121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770991450 + ... + 771153731.

It is an arithmetic number, because the mean of its divisors is an integer number (5801550174684).

Almost surely, 2^{125131202131521} is an apocalyptic number.

It is an amenable number.

125131202131521 is a deficient number, since it is larger than the sum of its proper divisors (60518403458367).

125131202131521 is a wasteful number, since it uses less digits than its factorization.

125131202131521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542145281.

The product of its (nonzero) digits is 3600, while the sum is 30.

It can be divided in two parts, 12513120 and 2131521, that added together give a palindrome (14644641).

The spelling of 125131202131521 in words is "one hundred twenty-five trillion, one hundred thirty-one billion, two hundred two million, one hundred thirty-one thousand, five hundred twenty-one".