12505122525 has 24 divisors (see below), whose sum is σ = 23628727744. Its totient is φ = 5716627200.

The previous prime is 12505122503. The next prime is 12505122527. The reversal of 12505122525 is 52522150521.

It is not a de Polignac number, because 12505122525 - 2²⁸ = 12236687069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12505122492 and 12505122501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505122527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11909116 + ... + 11910165.

Almost surely, 2^12505122525 is an apocalyptic number.

12505122525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12505122525 is a deficient number, since it is larger than the sum of its proper divisors (11123605219).

12505122525 is a wasteful number, since it uses less digits than its factorization.

12505122525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23819301 (or 23819296 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 12505122525 in words is "twelve billion, five hundred five million, one hundred twenty-two thousand, five hundred twenty-five".