321133233221 has 4 divisors (see below), whose sum is σ = 321820885152. Its totient is φ = 320445581292.

The previous prime is 321133233199. The next prime is 321133233271. The reversal of 321133233221 is 122332331123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122332331123 = 53 ⋅2308157191.

It is a cyclic number.

It is not a de Polignac number, because 321133233221 - 2²² = 321129038917 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 (321133233271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343825265 + ... + 343826198.

It is an arithmetic number, because the mean of its divisors is an integer number (80455221288).

Almost surely, 2^321133233221 is an apocalyptic number.

It is an amenable number.

321133233221 is a deficient number, since it is larger than the sum of its proper divisors (687651931).

321133233221 is an equidigital number, since it uses as much as digits as its factorization.

321133233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687651930.

The product of its digits is 3888, while the sum is 26.

Adding to 321133233221 its reverse (122332331123), we get a palindrome (443465564344).

The spelling of 321133233221 in words is "three hundred twenty-one billion, one hundred thirty-three million, two hundred thirty-three thousand, two hundred twenty-one".