12188107931 has 4 divisors (see below), whose sum is σ = 12188332200. Its totient is φ = 12187883664.

The previous prime is 12188107927. The next prime is 12188107961. The reversal of 12188107931 is 13970188121.

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

It is a cyclic number.

It is not a de Polignac number, because 12188107931 - 2² = 12188107927 is a prime.

It is a super-2 number, since 2×12188107931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12188107961) 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, 26600 + ... + 158378.

It is an arithmetic number, because the mean of its divisors is an integer number (3047083050).

Almost surely, 2^12188107931 is an apocalyptic number.

12188107931 is a deficient number, since it is larger than the sum of its proper divisors (224269).

12188107931 is an equidigital number, since it uses as much as digits as its factorization.

12188107931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224268.

The product of its (nonzero) digits is 24192, while the sum is 41.

The spelling of 12188107931 in words is "twelve billion, one hundred eighty-eight million, one hundred seven thousand, nine hundred thirty-one".