12231231 has 16 divisors (see below), whose sum is σ = 17462400. Its totient is φ = 7591968.

The previous prime is 12231229. The next prime is 12231253. The reversal of 12231231 is 13213221.

It is not a de Polignac number, because 12231231 - 2¹ = 12231229 is a prime.

It is a super-2 number, since 2×12231231² = 299206023550722, 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 12231231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1545 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (1091400).

Almost surely, 2^12231231 is an apocalyptic number.

12231231 is a deficient number, since it is larger than the sum of its proper divisors (5231169).

12231231 is a wasteful number, since it uses less digits than its factorization.

12231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718.

The product of its digits is 72, while the sum is 15.

The square root of 12231231 is about 3497.3176864563. The cubic root of 12231231 is about 230.4040220712.

Adding to 12231231 its reverse (13213221), we get a palindrome (25444452).

It can be divided in two parts, 12 and 231231, that multiplied together give a palindrome (2774772).

The spelling of 12231231 in words is "twelve million, two hundred thirty-one thousand, two hundred thirty-one".