331312221321 has 8 divisors (see below), whose sum is σ = 444675123264. Its totient is φ = 219412066800.

The previous prime is 331312221313. The next prime is 331312221337. The reversal of 331312221321 is 123122213133.

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

It is not a de Polignac number, because 331312221321 - 2³ = 331312221313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331312221291 and 331312221300.

It is not an unprimeable number, because it can be changed into a prime (331312221371) 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, 365686326 + ... + 365687231.

It is an arithmetic number, because the mean of its divisors is an integer number (55584390408).

Almost surely, 2^331312221321 is an apocalyptic number.

It is an amenable number.

331312221321 is a deficient number, since it is larger than the sum of its proper divisors (113362901943).

331312221321 is a wasteful number, since it uses less digits than its factorization.

331312221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731373711.

The product of its digits is 1296, while the sum is 24.

Adding to 331312221321 its reverse (123122213133), we get a palindrome (454434434454).

The spelling of 331312221321 in words is "three hundred thirty-one billion, three hundred twelve million, two hundred twenty-one thousand, three hundred twenty-one".