12331131 has 8 divisors (see below), whose sum is σ = 16534080. Its totient is φ = 8174472.

The previous prime is 12331127. The next prime is 12331141. The reversal of 12331131 is 13113321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12331131 - 2² = 12331127 is a prime.

It is a super-2 number, since 2×12331131² = 304113583478322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12331131.

It is not an unprimeable number, because it can be changed into a prime (12331141) 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 7 ways as a sum of consecutive naturals, for example, 10945 + ... + 12018.

It is an arithmetic number, because the mean of its divisors is an integer number (2066760).

Almost surely, 2^12331131 is an apocalyptic number.

12331131 is a deficient number, since it is larger than the sum of its proper divisors (4202949).

12331131 is a wasteful number, since it uses less digits than its factorization.

12331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23145.

The product of its digits is 54, while the sum is 15.

The square root of 12331131 is about 3511.5710159414. The cubic root of 12331131 is about 231.0296058454.

Adding to 12331131 its reverse (13113321), we get a palindrome (25444452).

The spelling of 12331131 in words is "twelve million, three hundred thirty-one thousand, one hundred thirty-one".