12321121321 has 4 divisors (see below), whose sum is σ = 12856822272. Its totient is φ = 11785420372.

The previous prime is 12321121301. The next prime is 12321121327. The reversal of 12321121321 is 12312112321.

12321121321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12321121321 - 2⁷ = 12321121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321121327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267850441 + ... + 267850486.

It is an arithmetic number, because the mean of its divisors is an integer number (3214205568).

Almost surely, 2^12321121321 is an apocalyptic number.

It is an amenable number.

12321121321 is a deficient number, since it is larger than the sum of its proper divisors (535700951).

12321121321 is an equidigital number, since it uses as much as digits as its factorization.

12321121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535700950.

The product of its digits is 144, while the sum is 19.

Adding to 12321121321 its reverse (12312112321), we get a palindrome (24633233642).

The spelling of 12321121321 in words is "twelve billion, three hundred twenty-one million, one hundred twenty-one thousand, three hundred twenty-one".