12158712113 has 4 divisors (see below), whose sum is σ = 12185792100. Its totient is φ = 12131632128.

The previous prime is 12158712109. The next prime is 12158712133. The reversal of 12158712113 is 31121785121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3774013489 + 8384698624 = 61433^2 + 91568^2 .

It is a cyclic number.

It is not a de Polignac number, because 12158712113 - 2² = 12158712109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12158712113.

It is not an unprimeable number, because it can be changed into a prime (12158712133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13539320 + ... + 13540217.

It is an arithmetic number, because the mean of its divisors is an integer number (3046448025).

Almost surely, 2^12158712113 is an apocalyptic number.

It is an amenable number.

12158712113 is a deficient number, since it is larger than the sum of its proper divisors (27079987).

12158712113 is an equidigital number, since it uses as much as digits as its factorization.

12158712113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27079986.

The product of its digits is 3360, while the sum is 32.

The spelling of 12158712113 in words is "twelve billion, one hundred fifty-eight million, seven hundred twelve thousand, one hundred thirteen".