12320323231 has 4 divisors (see below), whose sum is σ = 12320557200. Its totient is φ = 12320089264.

The previous prime is 12320323229. The next prime is 12320323243. The reversal of 12320323231 is 13232302321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12320323231 - 2¹ = 12320323229 is a prime.

It is a super-2 number, since 2×12320323231² (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 (12320323201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3075 + ... + 157003.

It is an arithmetic number, because the mean of its divisors is an integer number (3080139300).

Almost surely, 2^12320323231 is an apocalyptic number.

12320323231 is a deficient number, since it is larger than the sum of its proper divisors (233969).

12320323231 is an equidigital number, since it uses as much as digits as its factorization.

12320323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233968.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 12320323231 its reverse (13232302321), we get a palindrome (25552625552).

The spelling of 12320323231 in words is "twelve billion, three hundred twenty million, three hundred twenty-three thousand, two hundred thirty-one".