12131233 has 4 divisors (see below), whose sum is σ = 12208660. Its totient is φ = 12053808.

The previous prime is 12131219. The next prime is 12131257. The reversal of 12131233 is 33213121.

12131233 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.

It can be written as a sum of positive squares in 2 ways, for example, as 5536609 + 6594624 = 2353^2 + 2568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131293) 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, 38478 + ... + 38791.

It is an arithmetic number, because the mean of its divisors is an integer number (3052165).

Almost surely, 2^12131233 is an apocalyptic number.

It is an amenable number.

12131233 is a deficient number, since it is larger than the sum of its proper divisors (77427).

12131233 is an equidigital number, since it uses as much as digits as its factorization.

12131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77426.

The product of its digits is 108, while the sum is 16.

The square root of 12131233 is about 3482.9919609439. The cubic root of 12131233 is about 229.7744038745.

Adding to 12131233 its reverse (33213121), we get a palindrome (45344354).

The spelling of 12131233 in words is "twelve million, one hundred thirty-one thousand, two hundred thirty-three".