12231123231 has 16 divisors (see below), whose sum is σ = 16353216000. Its totient is φ = 8131583040.

The previous prime is 12231123227. The next prime is 12231123257. The reversal of 12231123231 is 13232113221.

It is not a de Polignac number, because 12231123231 - 2² = 12231123227 is a prime.

It is a super-2 number, since 2×12231123231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12231123198 and 12231123207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231123221) 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, 2861626 + ... + 2865896.

It is an arithmetic number, because the mean of its divisors is an integer number (1022076000).

Almost surely, 2^12231123231 is an apocalyptic number.

12231123231 is a deficient number, since it is larger than the sum of its proper divisors (4122092769).

12231123231 is a wasteful number, since it uses less digits than its factorization.

12231123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686.

The product of its digits is 432, while the sum is 21.

Adding to 12231123231 its reverse (13232113221), we get a palindrome (25463236452).

The spelling of 12231123231 in words is "twelve billion, two hundred thirty-one million, one hundred twenty-three thousand, two hundred thirty-one".