12191133 has 4 divisors (see below), whose sum is σ = 16254848. Its totient is φ = 8127420.

The previous prime is 12191129. The next prime is 12191147. The reversal of 12191133 is 33119121.

12191133 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12191133 - 2² = 12191129 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 (12191233) 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, 2031853 + ... + 2031858.

It is an arithmetic number, because the mean of its divisors is an integer number (4063712).

Almost surely, 2^12191133 is an apocalyptic number.

It is an amenable number.

12191133 is a deficient number, since it is larger than the sum of its proper divisors (4063715).

12191133 is an equidigital number, since it uses as much as digits as its factorization.

12191133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4063714.

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

The square root of 12191133 is about 3491.5803012390. The cubic root of 12191133 is about 230.1519663629.

The spelling of 12191133 in words is "twelve million, one hundred ninety-one thousand, one hundred thirty-three".