331221023312 has 40 divisors (see below), whose sum is σ = 647031132000. Its totient is φ = 164248633472.

The previous prime is 331221023293. The next prime is 331221023327. The reversal of 331221023312 is 213320122133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465643 + ... + 1676469.

It is an arithmetic number, because the mean of its divisors is an integer number (16175778300).

Almost surely, 2^331221023312 is an apocalyptic number.

It is an amenable number.

331221023312 is a deficient number, since it is larger than the sum of its proper divisors (315810108688).

331221023312 is a wasteful number, since it uses less digits than its factorization.

331221023312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211643 (or 211637 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 331221023312 its reverse (213320122133), we get a palindrome (544541145445).

The spelling of 331221023312 in words is "three hundred thirty-one billion, two hundred twenty-one million, twenty-three thousand, three hundred twelve".