323213131232221 has 4 divisors (see below), whose sum is σ = 323280650169792. Its totient is φ = 323145612294652.

The previous prime is 323213131232093. The next prime is 323213131232231. The reversal of 323213131232221 is 122232131312323.

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 323213131232221 - 2⁷ = 323213131232093 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 (323213131232231) 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, 33759461605 + ... + 33759471178.

It is an arithmetic number, because the mean of its divisors is an integer number (80820162542448).

Almost surely, 2^{323213131232221} is an apocalyptic number.

It is an amenable number.

323213131232221 is a deficient number, since it is larger than the sum of its proper divisors (67518937571).

323213131232221 is an equidigital number, since it uses as much as digits as its factorization.

323213131232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67518937570.

The product of its digits is 15552, while the sum is 31.

Adding to 323213131232221 its reverse (122232131312323), we get a palindrome (445445262544544).

The spelling of 323213131232221 in words is "three hundred twenty-three trillion, two hundred thirteen billion, one hundred thirty-one million, two hundred thirty-two thousand, two hundred twenty-one".