331011322221 has 4 divisors (see below), whose sum is σ = 441348429632. Its totient is φ = 220674214812.

The previous prime is 331011322219. The next prime is 331011322231. The reversal of 331011322221 is 122223110133.

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 331011322221 - 2¹ = 331011322219 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 (331011322211) 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, 55168553701 + ... + 55168553706.

It is an arithmetic number, because the mean of its divisors is an integer number (110337107408).

Almost surely, 2^331011322221 is an apocalyptic number.

It is an amenable number.

331011322221 is a deficient number, since it is larger than the sum of its proper divisors (110337107411).

331011322221 is a wasteful number, since it uses less digits than its factorization.

331011322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110337107410.

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

Adding to 331011322221 its reverse (122223110133), we get a palindrome (453234432354).

The spelling of 331011322221 in words is "three hundred thirty-one billion, eleven million, three hundred twenty-two thousand, two hundred twenty-one".