321213244031221 has 8 divisors (see below), whose sum is σ = 321283539226944. Its totient is φ = 321142950212640.

The previous prime is 321213244031201. The next prime is 321213244031279. The reversal of 321213244031221 is 122130442312123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321213244031221 - 2²⁵ = 321213210476789 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 (321213244031201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568028200 + ... + 568593406.

It is an arithmetic number, because the mean of its divisors is an integer number (40160442403368).

Almost surely, 2^{321213244031221} is an apocalyptic number.

It is an amenable number.

321213244031221 is a deficient number, since it is larger than the sum of its proper divisors (70295195723).

321213244031221 is a wasteful number, since it uses less digits than its factorization.

321213244031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688571.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 321213244031221 its reverse (122130442312123), we get a palindrome (443343686343344).

The spelling of 321213244031221 in words is "three hundred twenty-one trillion, two hundred thirteen billion, two hundred forty-four million, thirty-one thousand, two hundred twenty-one".