12637715121 has 8 divisors (see below), whose sum is σ = 18722540960. Its totient is φ = 8425143396.

The previous prime is 12637715087. The next prime is 12637715137. The reversal of 12637715121 is 12151773621.

12637715121 is a `hidden beast` number, since 1 + 2 + 637 + 7 + 1 + 5 + 12 + 1 = 666.

It is not a de Polignac number, because 12637715121 - 2¹⁰ = 12637714097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12637715621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234031735 + ... + 234031788.

It is an arithmetic number, because the mean of its divisors is an integer number (2340317620).

Almost surely, 2^12637715121 is an apocalyptic number.

It is an amenable number.

12637715121 is a deficient number, since it is larger than the sum of its proper divisors (6084825839).

12637715121 is an equidigital number, since it uses as much as digits as its factorization.

12637715121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468063532 (or 468063526 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The spelling of 12637715121 in words is "twelve billion, six hundred thirty-seven million, seven hundred fifteen thousand, one hundred twenty-one".