12331911 has 4 divisors (see below), whose sum is σ = 16442552. Its totient is φ = 8221272.

The previous prime is 12331909. The next prime is 12331951. The reversal of 12331911 is 11913321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12331911 - 2¹ = 12331909 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 (12331951) 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 3 ways as a sum of consecutive naturals, for example, 2055316 + ... + 2055321.

It is an arithmetic number, because the mean of its divisors is an integer number (4110638).

Almost surely, 2^12331911 is an apocalyptic number.

12331911 is a deficient number, since it is larger than the sum of its proper divisors (4110641).

12331911 is an equidigital number, since it uses as much as digits as its factorization.

12331911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110640.

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

The square root of 12331911 is about 3511.6820755871. The cubic root of 12331911 is about 231.0344769664.

The spelling of 12331911 in words is "twelve million, three hundred thirty-one thousand, nine hundred eleven".