331311321012 has 288 divisors, whose sum is σ = 1030256381952. Its totient is φ = 80730473472.

The previous prime is 331311320983. The next prime is 331311321023. The reversal of 331311321012 is 210123113133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 331311321012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11842713 + ... + 11870655.

It is an arithmetic number, because the mean of its divisors is an integer number (3577279104).

Almost surely, 2^331311321012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331311321012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515128190976).

331311321012 is an abundant number, since it is smaller than the sum of its proper divisors (698945060940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331311321012 is a wasteful number, since it uses less digits than its factorization.

331311321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28035 (or 28014 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 331311321012 its reverse (210123113133), we get a palindrome (541434434145).

The spelling of 331311321012 in words is "three hundred thirty-one billion, three hundred eleven million, three hundred twenty-one thousand, twelve".