12113431 has 16 divisors (see below), whose sum is σ = 14054400. Its totient is φ = 10410840.

The previous prime is 12113417. The next prime is 12113443. The reversal of 12113431 is 13431121.

It is not a de Polignac number, because 12113431 - 2⁷ = 12113303 is a prime.

It is a super-2 number, since 2×12113431² = 293470421183522, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12113471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25050 + ... + 25528.

It is an arithmetic number, because the mean of its divisors is an integer number (878400).

Almost surely, 2^12113431 is an apocalyptic number.

12113431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12113431 is a deficient number, since it is larger than the sum of its proper divisors (1940969).

12113431 is an equidigital number, since it uses as much as digits as its factorization.

12113431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 509 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 12113431 is about 3480.4354612606. The cubic root of 12113431 is about 229.6619545625.

Adding to 12113431 its reverse (13431121), we get a palindrome (25544552).

It can be divided in two parts, 12113 and 431, that added together give a square (12544 = 112²).

The spelling of 12113431 in words is "twelve million, one hundred thirteen thousand, four hundred thirty-one".