12520138237 has 8 divisors (see below), whose sum is σ = 13079727360. Its totient is φ = 11970281280.

The previous prime is 12520138231. The next prime is 12520138261. The reversal of 12520138237 is 73283102521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12520138237 is a prime.

It is a super-2 number, since 2×12520138237² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520138231) 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, 2430412 + ... + 2435557.

It is an arithmetic number, because the mean of its divisors is an integer number (1634965920).

Almost surely, 2^12520138237 is an apocalyptic number.

It is an amenable number.

12520138237 is a deficient number, since it is larger than the sum of its proper divisors (559589123).

12520138237 is an equidigital number, since it uses as much as digits as its factorization.

12520138237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866083.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 12520138237 in words is "twelve billion, five hundred twenty million, one hundred thirty-eight thousand, two hundred thirty-seven".