12180320131 has 16 divisors (see below), whose sum is σ = 14475038400. Its totient is φ = 10028003328.

The previous prime is 12180320111. The next prime is 12180320147. The reversal of 12180320131 is 13102308121.

It is a happy number.

It is not a de Polignac number, because 12180320131 - 2²³ = 12171931523 is a prime.

It is a super-2 number, since 2×12180320131² (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 (12180320111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116266 + ... + 194623.

It is an arithmetic number, because the mean of its divisors is an integer number (904689900).

Almost surely, 2^12180320131 is an apocalyptic number.

12180320131 is a deficient number, since it is larger than the sum of its proper divisors (2294718269).

12180320131 is a wasteful number, since it uses less digits than its factorization.

12180320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311118.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12180320131 its reverse (13102308121), we get a palindrome (25282628252).

The spelling of 12180320131 in words is "twelve billion, one hundred eighty million, three hundred twenty thousand, one hundred thirty-one".