12113231 has 16 divisors (see below), whose sum is σ = 14061600. Its totient is φ = 10334208.

The previous prime is 12113221. The next prime is 12113251. The reversal of 12113231 is 13231121.

12113231 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12113231 is a prime.

It is a super-2 number, since 2×12113231² = 293460730518722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113201) 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, 12575 + ... + 13503.

It is an arithmetic number, because the mean of its divisors is an integer number (878850).

Almost surely, 2^12113231 is an apocalyptic number.

12113231 is a deficient number, since it is larger than the sum of its proper divisors (1948369).

12113231 is a wasteful number, since it uses less digits than its factorization.

12113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018.

The product of its digits is 36, while the sum is 14.

The square root of 12113231 is about 3480.4067291051. The cubic root of 12113231 is about 229.6606906034.

Adding to 12113231 its reverse (13231121), we get a palindrome (25344352).

The spelling of 12113231 in words is "twelve million, one hundred thirteen thousand, two hundred thirty-one".