331321021132220 has 192 divisors, whose sum is σ = 815210273009664. Its totient is φ = 110737382891520.

The previous prime is 331321021132181. The next prime is 331321021132229. The reversal of 331321021132220 is 22231120123133.

It is a self number, because there is not a number n which added to its sum of digits gives 331321021132220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331321021132229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72865847987 + ... + 72865852533.

It is an arithmetic number, because the mean of its divisors is an integer number (4245886838592).

Almost surely, 2^{331321021132220} 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 331321021132220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407605136504832).

331321021132220 is an abundant number, since it is smaller than the sum of its proper divisors (483889251877444).

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

331321021132220 is a wasteful number, since it uses less digits than its factorization.

331321021132220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11868 (or 11866 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 331321021132220 its reverse (22231120123133), we get a palindrome (353552141255353).

The spelling of 331321021132220 in words is "three hundred thirty-one trillion, three hundred twenty-one billion, twenty-one million, one hundred thirty-two thousand, two hundred twenty".