12321220313 has 4 divisors (see below), whose sum is σ = 12856925568. Its totient is φ = 11785515060.

The previous prime is 12321220283. The next prime is 12321220333. The reversal of 12321220313 is 31302212321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12321220313 - 2¹⁰ = 12321219289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321220333) 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, 267852593 + ... + 267852638.

It is an arithmetic number, because the mean of its divisors is an integer number (3214231392).

Almost surely, 2^12321220313 is an apocalyptic number.

It is an amenable number.

12321220313 is a deficient number, since it is larger than the sum of its proper divisors (535705255).

12321220313 is an equidigital number, since it uses as much as digits as its factorization.

12321220313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535705254.

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

Adding to 12321220313 its reverse (31302212321), we get a palindrome (43623432634).

The spelling of 12321220313 in words is "twelve billion, three hundred twenty-one million, two hundred twenty thousand, three hundred thirteen".