321430340431021 has 12 divisors (see below), whose sum is σ = 332958889312192. Its totient is φ = 310288228329744.

The previous prime is 321430340431003. The next prime is 321430340431073. The reversal of 321430340431021 is 120134043034123.

It is not a de Polignac number, because 321430340431021 - 2⁵ = 321430340430989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321430340431721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31424181 + ... + 40377466.

Almost surely, 2^{321430340431021} is an apocalyptic number.

It is an amenable number.

321430340431021 is a deficient number, since it is larger than the sum of its proper divisors (11528548881171).

321430340431021 is an equidigital number, since it uses as much as digits as its factorization.

321430340431021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71807028 (or 71806999 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 321430340431021 its reverse (120134043034123), we get a palindrome (441564383465144).

The spelling of 321430340431021 in words is "three hundred twenty-one trillion, four hundred thirty billion, three hundred forty million, four hundred thirty-one thousand, twenty-one".