321321440220323 has 4 divisors (see below), whose sum is σ = 321322706850288. Its totient is φ = 321320173590360.

The previous prime is 321321440220317. The next prime is 321321440220413. The reversal of 321321440220323 is 323022044123123.

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

It is a cyclic number.

It is not a de Polignac number, because 321321440220323 - 2⁴⁰ = 320221928592547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321321440220323.

It is not an unprimeable number, because it can be changed into a prime (321321440120323) 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, 632934383 + ... + 633441848.

It is an arithmetic number, because the mean of its divisors is an integer number (80330676712572).

Almost surely, 2^{321321440220323} is an apocalyptic number.

321321440220323 is a deficient number, since it is larger than the sum of its proper divisors (1266629965).

321321440220323 is a wasteful number, since it uses less digits than its factorization.

321321440220323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266629964.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 321321440220323 its reverse (323022044123123), we get a palindrome (644343484343446).

The spelling of 321321440220323 in words is "three hundred twenty-one trillion, three hundred twenty-one billion, four hundred forty million, two hundred twenty thousand, three hundred twenty-three".