331221213323 has 32 divisors (see below), whose sum is σ = 445187473920. Its totient is φ = 237988776960.

The previous prime is 331221213233. The next prime is 331221213329. The reversal of 331221213323 is 323312122133.

It is not a de Polignac number, because 331221213323 - 2²⁶ = 331154104459 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 331221213292 and 331221213301.

It is not an unprimeable number, because it can be changed into a prime (331221213329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 773243 + ... + 1122651.

It is an arithmetic number, because the mean of its divisors is an integer number (13912108560).

Almost surely, 2^331221213323 is an apocalyptic number.

331221213323 is a deficient number, since it is larger than the sum of its proper divisors (113966260597).

331221213323 is a wasteful number, since it uses less digits than its factorization.

331221213323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350387.

The product of its digits is 3888, while the sum is 26.

Adding to 331221213323 its reverse (323312122133), we get a palindrome (654533335456).

The spelling of 331221213323 in words is "three hundred thirty-one billion, two hundred twenty-one million, two hundred thirteen thousand, three hundred twenty-three".