12320213231 has 16 divisors (see below), whose sum is σ = 12863370240. Its totient is φ = 11785213440.

The previous prime is 12320213221. The next prime is 12320213251. The reversal of 12320213231 is 13231202321.

It is a cyclic number.

It is not a de Polignac number, because 12320213231 - 2¹⁰ = 12320212207 is a prime.

It is a super-2 number, since 2×12320213231² (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 (12320213221) 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, 3242825 + ... + 3246621.

It is an arithmetic number, because the mean of its divisors is an integer number (803960640).

Almost surely, 2^12320213231 is an apocalyptic number.

12320213231 is a deficient number, since it is larger than the sum of its proper divisors (543157009).

12320213231 is a wasteful number, since it uses less digits than its factorization.

12320213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4834.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12320213231 its reverse (13231202321), we get a palindrome (25551415552).

The spelling of 12320213231 in words is "twelve billion, three hundred twenty million, two hundred thirteen thousand, two hundred thirty-one".