321132211323221 has 4 divisors (see below), whose sum is σ = 321132268779744. Its totient is φ = 321132153866700.

The previous prime is 321132211323163. The next prime is 321132211323251. The reversal of 321132211323221 is 122323112231123.

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 321132211323221 - 2⁴⁶ = 250763467145557 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 (321132211323251) 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, 19316825 + ... + 31865406.

It is an arithmetic number, because the mean of its divisors is an integer number (80283067194936).

Almost surely, 2^{321132211323221} is an apocalyptic number.

It is an amenable number.

321132211323221 is a deficient number, since it is larger than the sum of its proper divisors (57456523).

321132211323221 is an equidigital number, since it uses as much as digits as its factorization.

321132211323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57456522.

The product of its digits is 5184, while the sum is 29.

Adding to 321132211323221 its reverse (122323112231123), we get a palindrome (443455323554344).

The spelling of 321132211323221 in words is "three hundred twenty-one trillion, one hundred thirty-two billion, two hundred eleven million, three hundred twenty-three thousand, two hundred twenty-one".