321221033013 has 4 divisors (see below), whose sum is σ = 428294710688. Its totient is φ = 214147355340.

The previous prime is 321221032999. The next prime is 321221033039. The reversal of 321221033013 is 310330122123.

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 not a de Polignac number, because 321221033013 - 2⁶ = 321221032949 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 (321221033053) 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, 53536838833 + ... + 53536838838.

It is an arithmetic number, because the mean of its divisors is an integer number (107073677672).

Almost surely, 2^321221033013 is an apocalyptic number.

It is an amenable number.

321221033013 is a deficient number, since it is larger than the sum of its proper divisors (107073677675).

321221033013 is a wasteful number, since it uses less digits than its factorization.

321221033013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107073677674.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 321221033013 its reverse (310330122123), we get a palindrome (631551155136).

The spelling of 321221033013 in words is "three hundred twenty-one billion, two hundred twenty-one million, thirty-three thousand, thirteen".