331221121322321 has 4 divisors (see below), whose sum is σ = 331231563052644. Its totient is φ = 331210679592000.

The previous prime is 331221121322293. The next prime is 331221121322359. The reversal of 331221121322321 is 123223121122133.

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 2592386587921 + 328628734734400 = 1610089^2 + 18128120^2 .

It is a cyclic number.

It is not a de Polignac number, because 331221121322321 - 2¹⁴ = 331221121305937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331221121322921) 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, 5220817580 + ... + 5220881021.

It is an arithmetic number, because the mean of its divisors is an integer number (82807890763161).

Almost surely, 2^{331221121322321} is an apocalyptic number.

It is an amenable number.

331221121322321 is a deficient number, since it is larger than the sum of its proper divisors (10441730323).

331221121322321 is a wasteful number, since it uses less digits than its factorization.

331221121322321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10441730322.

The product of its digits is 5184, while the sum is 29.

Adding to 331221121322321 its reverse (123223121122133), we get a palindrome (454444242444454).

The spelling of 331221121322321 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, three hundred twenty-one".