12311231 has 8 divisors (see below), whose sum is σ = 12581184. Its totient is φ = 12044160.

The previous prime is 12311219. The next prime is 12311251. The reversal of 12311231 is 13211321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311231 is a prime.

It is a super-2 number, since 2×12311231² = 303132817470722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9386 + ... + 10616.

It is an arithmetic number, because the mean of its divisors is an integer number (1572648).

Almost surely, 2^12311231 is an apocalyptic number.

12311231 is a deficient number, since it is larger than the sum of its proper divisors (269953).

12311231 is a wasteful number, since it uses less digits than its factorization.

12311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its digits is 36, while the sum is 14.

The square root of 12311231 is about 3508.7363822322. The cubic root of 12311231 is about 230.9052602759.

Adding to 12311231 its reverse (13211321), we get a palindrome (25522552).

The spelling of 12311231 in words is "twelve million, three hundred eleven thousand, two hundred thirty-one".