12112013131 has 4 divisors (see below), whose sum is σ = 12502723264. Its totient is φ = 11721303000.

The previous prime is 12112013107. The next prime is 12112013143. The reversal of 12112013131 is 13131021121.

It is a happy number.

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 12112013131 - 2¹⁷ = 12111882059 is a prime.

It is a super-2 number, since 2×12112013131² (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 (12112013191) 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, 195355020 + ... + 195355081.

It is an arithmetic number, because the mean of its divisors is an integer number (3125680816).

Almost surely, 2^12112013131 is an apocalyptic number.

12112013131 is a deficient number, since it is larger than the sum of its proper divisors (390710133).

12112013131 is an equidigital number, since it uses as much as digits as its factorization.

12112013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390710132.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12112013131 its reverse (13131021121), we get a palindrome (25243034252).

The spelling of 12112013131 in words is "twelve billion, one hundred twelve million, thirteen thousand, one hundred thirty-one".