12131685225 has 96 divisors (see below), whose sum is σ = 25369804800. Its totient is φ = 5626209600.

The previous prime is 12131685191. The next prime is 12131685253. The reversal of 12131685225 is 52258613121.

12131685225 is a `hidden beast` number, since 121 + 3 + 1 + 6 + 8 + 522 + 5 = 666.

It is not a de Polignac number, because 12131685225 - 2⁶ = 12131685161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12131685225.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 135256 + ... + 206294.

It is an arithmetic number, because the mean of its divisors is an integer number (264268800).

Almost surely, 2^12131685225 is an apocalyptic number.

12131685225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12131685225 is an abundant number, since it is smaller than the sum of its proper divisors (13238119575).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131685225 is a wasteful number, since it uses less digits than its factorization.

12131685225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71092 (or 71081 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The spelling of 12131685225 in words is "twelve billion, one hundred thirty-one million, six hundred eighty-five thousand, two hundred twenty-five".