12133331 has 12 divisors (see below), whose sum is σ = 14198472. Its totient is φ = 10338048.

The previous prime is 12133321. The next prime is 12133333. The reversal of 12133331 is 13333121.

It is not a de Polignac number, because 12133331 - 2²² = 7939027 is a prime.

It is a super-2 number, since 2×12133331² = 294435442311122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12133333) 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 11 ways as a sum of consecutive naturals, for example, 8816 + ... + 10098.

It is an arithmetic number, because the mean of its divisors is an integer number (1183206).

Almost surely, 2^12133331 is an apocalyptic number.

12133331 is a deficient number, since it is larger than the sum of its proper divisors (2065141).

12133331 is a wasteful number, since it uses less digits than its factorization.

12133331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1483 counting only the distinct ones).

The product of its digits is 162, while the sum is 17.

The square root of 12133331 is about 3483.2931257648. The cubic root of 12133331 is about 229.7876489946.

Adding to 12133331 its reverse (13333121), we get a palindrome (25466452).

The spelling of 12133331 in words is "twelve million, one hundred thirty-three thousand, three hundred thirty-one".