331220012120 has 128 divisors (see below), whose sum is σ = 781553664000. Its totient is φ = 126177315840.

The previous prime is 331220012117. The next prime is 331220012129. The reversal of 331220012120 is 21210022133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331220012129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43355261 + ... + 43362899.

It is an arithmetic number, because the mean of its divisors is an integer number (6105888000).

Almost surely, 2^331220012120 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 331220012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390776832000).

331220012120 is an abundant number, since it is smaller than the sum of its proper divisors (450333651880).

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

331220012120 is a wasteful number, since it uses less digits than its factorization.

331220012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233 (or 8229 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 331220012120 its reverse (21210022133), we get a palindrome (352430034253).

The spelling of 331220012120 in words is "three hundred thirty-one billion, two hundred twenty million, twelve thousand, one hundred twenty".