12321122231 has 16 divisors (see below), whose sum is σ = 13488577920. Its totient is φ = 11161631520.

The previous prime is 12321122189. The next prime is 12321122251. The reversal of 12321122231 is 13222112321.

It is a cyclic number.

It is not a de Polignac number, because 12321122231 - 2⁶ = 12321122167 is a prime.

It is a super-2 number, since 2×12321122231² (a number of 21 digits) 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 (12321122251) 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, 7108841 + ... + 7110573.

It is an arithmetic number, because the mean of its divisors is an integer number (843036120).

Almost surely, 2^12321122231 is an apocalyptic number.

12321122231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12321122231 is a deficient number, since it is larger than the sum of its proper divisors (1167455689).

12321122231 is a wasteful number, since it uses less digits than its factorization.

12321122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646.

The product of its digits is 288, while the sum is 20.

Adding to 12321122231 its reverse (13222112321), we get a palindrome (25543234552).

The spelling of 12321122231 in words is "twelve billion, three hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty-one".