12312133 has 4 divisors (see below), whose sum is σ = 12960160. Its totient is φ = 11664108.

The previous prime is 12312119. The next prime is 12312143. The reversal of 12312133 is 33121321.

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: 33121321 = 17 ⋅1948313.

It is a cyclic number.

It is not a de Polignac number, because 12312133 - 2⁵ = 12312101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312103) 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, 323985 + ... + 324022.

It is an arithmetic number, because the mean of its divisors is an integer number (3240040).

Almost surely, 2^12312133 is an apocalyptic number.

It is an amenable number.

12312133 is a deficient number, since it is larger than the sum of its proper divisors (648027).

12312133 is an equidigital number, since it uses as much as digits as its factorization.

12312133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648026.

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

The square root of 12312133 is about 3508.8649161802. The cubic root of 12312133 is about 230.9108993399.

Adding to 12312133 its reverse (33121321), we get a palindrome (45433454).

It can be divided in two parts, 1231 and 2133, that added together give a square (3364 = 58²).

The spelling of 12312133 in words is "twelve million, three hundred twelve thousand, one hundred thirty-three".