12320402321 has 4 divisors (see below), whose sum is σ = 12321406644. Its totient is φ = 12319398000.

The previous prime is 12320402291. The next prime is 12320402327.

12320402321 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10498051600 + 1822350721 = 102460^2 + 42689^2 .

It is a cyclic number.

It is not a de Polignac number, because 12320402321 - 2⁶ = 12320402257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320402293 and 12320402302.

It is not an unprimeable number, because it can be changed into a prime (12320402327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483530 + ... + 508371.

It is an arithmetic number, because the mean of its divisors is an integer number (3080351661).

Almost surely, 2^12320402321 is an apocalyptic number.

It is an amenable number.

12320402321 is a deficient number, since it is larger than the sum of its proper divisors (1004323).

12320402321 is an equidigital number, since it uses as much as digits as its factorization.

12320402321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004322.

The product of its (nonzero) digits is 576, while the sum is 20.

The spelling of 12320402321 in words is "twelve billion, three hundred twenty million, four hundred two thousand, three hundred twenty-one".