12031113 has 4 divisors (see below), whose sum is σ = 16041488. Its totient is φ = 8020740.

The previous prime is 12031111. The next prime is 12031133. The reversal of 12031113 is 31113021.

12031113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31113021 = 3 ⋅10371007.

It is not a de Polignac number, because 12031113 - 2¹ = 12031111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031111) 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, 2005183 + ... + 2005188.

It is an arithmetic number, because the mean of its divisors is an integer number (4010372).

Almost surely, 2^12031113 is an apocalyptic number.

It is an amenable number.

12031113 is a deficient number, since it is larger than the sum of its proper divisors (4010375).

12031113 is an equidigital number, since it uses as much as digits as its factorization.

12031113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010374.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 12031113 is about 3468.5894827725. The cubic root of 12031113 is about 229.1405416095.

Adding to 12031113 its reverse (31113021), we get a palindrome (43144134).

The spelling of 12031113 in words is "twelve million, thirty-one thousand, one hundred thirteen".