321311023221 has 8 divisors (see below), whose sum is σ = 431251881664. Its totient is φ = 212788756800.

The previous prime is 321311023219. The next prime is 321311023237. The reversal of 321311023221 is 122320113123.

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

It is not a de Polignac number, because 321311023221 - 2¹ = 321311023219 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 (321311023321) 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, 354647476 + ... + 354648381.

It is an arithmetic number, because the mean of its divisors is an integer number (53906485208).

Almost surely, 2^321311023221 is an apocalyptic number.

It is an amenable number.

321311023221 is a deficient number, since it is larger than the sum of its proper divisors (109940858443).

321311023221 is a wasteful number, since it uses less digits than its factorization.

321311023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709296011.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 321311023221 its reverse (122320113123), we get a palindrome (443631136344).

The spelling of 321311023221 in words is "three hundred twenty-one billion, three hundred eleven million, twenty-three thousand, two hundred twenty-one".