12531131604125 has 16 divisors (see below), whose sum is σ = 16318802343168. Its totient is φ = 9589039834000.

The previous prime is 12531131604113. The next prime is 12531131604149. The reversal of 12531131604125 is 52140613113521.

It is a happy number.

It is not a de Polignac number, because 12531131604125 - 2¹⁰ = 12531131603101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2179324361 + ... + 2179330110.

It is an arithmetic number, because the mean of its divisors is an integer number (1019925146448).

Almost surely, 2^{12531131604125} is an apocalyptic number.

It is an amenable number.

12531131604125 is a deficient number, since it is larger than the sum of its proper divisors (3787670739043).

12531131604125 is an equidigital number, since it uses as much as digits as its factorization.

12531131604125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358654509 (or 4358654499 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

Adding to 12531131604125 its reverse (52140613113521), we get a palindrome (64671744717646).

The spelling of 12531131604125 in words is "twelve trillion, five hundred thirty-one billion, one hundred thirty-one million, six hundred four thousand, one hundred twenty-five".