12112011231 has 16 divisors (see below), whose sum is σ = 16302135168. Its totient is φ = 7998504800.

The previous prime is 12112011227. The next prime is 12112011257. The reversal of 12112011231 is 13211021121.

It is a cyclic number.

It is not a de Polignac number, because 12112011231 - 2² = 12112011227 is a prime.

It is a super-2 number, since 2×12112011231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12112011231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112011031) 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, 191236 + ... + 246566.

It is an arithmetic number, because the mean of its divisors is an integer number (1018883448).

Almost surely, 2^12112011231 is an apocalyptic number.

12112011231 is a deficient number, since it is larger than the sum of its proper divisors (4190123937).

12112011231 is a wasteful number, since it uses less digits than its factorization.

12112011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56022.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12112011231 its reverse (13211021121), we get a palindrome (25323032352).

The spelling of 12112011231 in words is "twelve billion, one hundred twelve million, eleven thousand, two hundred thirty-one".