12133191 has 32 divisors (see below), whose sum is σ = 19906560. Its totient is φ = 6418656.

The previous prime is 12133159. The next prime is 12133193. The reversal of 12133191 is 19133121.

12133191 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12133191 - 2⁵ = 12133159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18430 + ... + 19076.

It is an arithmetic number, because the mean of its divisors is an integer number (622080).

Almost surely, 2^12133191 is an apocalyptic number.

12133191 is a deficient number, since it is larger than the sum of its proper divisors (7773369).

12133191 is a wasteful number, since it uses less digits than its factorization.

12133191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its digits is 162, while the sum is 21.

The square root of 12133191 is about 3483.2730297810. The cubic root of 12133191 is about 229.7867651924.

The spelling of 12133191 in words is "twelve million, one hundred thirty-three thousand, one hundred ninety-one".