12159872117 has 4 divisors (see below), whose sum is σ = 12160414176. Its totient is φ = 12159330060.

The previous prime is 12159872099. The next prime is 12159872129. The reversal of 12159872117 is 71127895121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12159872117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12159872147) 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, 235859 + ... + 282752.

It is an arithmetic number, because the mean of its divisors is an integer number (3040103544).

Almost surely, 2^12159872117 is an apocalyptic number.

It is an amenable number.

12159872117 is a deficient number, since it is larger than the sum of its proper divisors (542059).

12159872117 is an equidigital number, since it uses as much as digits as its factorization.

12159872117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542058.

The product of its digits is 70560, while the sum is 44.

The spelling of 12159872117 in words is "twelve billion, one hundred fifty-nine million, eight hundred seventy-two thousand, one hundred seventeen".