323211322310221 has 4 divisors (see below), whose sum is σ = 323380277525052. Its totient is φ = 323042367095392.

The previous prime is 323211322310209. The next prime is 323211322310293. The reversal of 323211322310221 is 122013223112323.

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

It can be written as a sum of positive squares in 2 ways, for example, as 237865412568996 + 85345909741225 = 15422886^2 + 9238285^2 .

It is a cyclic number.

It is not a de Polignac number, because 323211322310221 - 2³⁹ = 322661566496333 is a prime.

It is a super-2 number, since 2×323211322310221² (a number of 30 digits) contains 22 as substring.

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 323211322310221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323211322320221) 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, 84477604546 + ... + 84477608371.

It is an arithmetic number, because the mean of its divisors is an integer number (80845069381263).

Almost surely, 2^{323211322310221} is an apocalyptic number.

It is an amenable number.

323211322310221 is a deficient number, since it is larger than the sum of its proper divisors (168955214831).

323211322310221 is a wasteful number, since it uses less digits than its factorization.

323211322310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168955214830.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 323211322310221 its reverse (122013223112323), we get a palindrome (445224545422544).

The spelling of 323211322310221 in words is "three hundred twenty-three trillion, two hundred eleven billion, three hundred twenty-two million, three hundred ten thousand, two hundred twenty-one".