12323213231 has 16 divisors (see below), whose sum is σ = 14235906048. Its totient is φ = 10449194400.

The previous prime is 12323213207. The next prime is 12323213233. The reversal of 12323213231 is 13231232321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12323213231 is a prime.

It is a super-2 number, since 2×12323213231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12323213197 and 12323213206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323213233) 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, 216536 + ... + 267458.

It is an arithmetic number, because the mean of its divisors is an integer number (889744128).

Almost surely, 2^12323213231 is an apocalyptic number.

12323213231 is a deficient number, since it is larger than the sum of its proper divisors (1912692817).

12323213231 is a wasteful number, since it uses less digits than its factorization.

12323213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51302.

The product of its digits is 1296, while the sum is 23.

Adding to 12323213231 its reverse (13231232321), we get a palindrome (25554445552).

The spelling of 12323213231 in words is "twelve billion, three hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-one".