12213133 has 4 divisors (see below), whose sum is σ = 12220128. Its totient is φ = 12206140.

The previous prime is 12213127. The next prime is 12213137. The reversal of 12213133 is 33131221.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12213133 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 (12213137) 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, 1560 + ... + 5182.

It is an arithmetic number, because the mean of its divisors is an integer number (3055032).

Almost surely, 2^12213133 is an apocalyptic number.

It is an amenable number.

12213133 is a deficient number, since it is larger than the sum of its proper divisors (6995).

12213133 is an equidigital number, since it uses as much as digits as its factorization.

12213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994.

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

The square root of 12213133 is about 3494.7293171289. The cubic root of 12213133 is about 230.2903265015.

Adding to 12213133 its reverse (33131221), we get a palindrome (45344354).

The spelling of 12213133 in words is "twelve million, two hundred thirteen thousand, one hundred thirty-three".