321322323221 has 4 divisors (see below), whose sum is σ = 321625172844. Its totient is φ = 321019473600.

The previous prime is 321322323211. The next prime is 321322323233. The reversal of 321322323221 is 122323223123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122323223123 = 3877 ⋅31550999.

It can be written as a sum of positive squares in 2 ways, for example, as 278402914321 + 42919408900 = 527639^2 + 207170^2 .

It is a cyclic number.

It is not a de Polignac number, because 321322323221 - 2¹⁰ = 321322322197 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 (321322323211) 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, 151423220 + ... + 151425341.

It is an arithmetic number, because the mean of its divisors is an integer number (80406293211).

Almost surely, 2^321322323221 is an apocalyptic number.

It is an amenable number.

321322323221 is a deficient number, since it is larger than the sum of its proper divisors (302849623).

321322323221 is a wasteful number, since it uses less digits than its factorization.

321322323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302849622.

The product of its digits is 5184, while the sum is 26.

Adding to 321322323221 its reverse (122323223123), we get a palindrome (443645546344).

The spelling of 321322323221 in words is "three hundred twenty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, two hundred twenty-one".