331020312020 has 48 divisors (see below), whose sum is σ = 739276009920. Its totient is φ = 124070398464.

The previous prime is 331020311987. The next prime is 331020312059. The reversal of 331020312020 is 20213020133.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 331020312020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2067290 + ... + 2221649.

It is an arithmetic number, because the mean of its divisors is an integer number (15401583540).

Almost surely, 2^331020312020 is an apocalyptic number.

It is an amenable number.

331020312020 is an abundant number, since it is smaller than the sum of its proper divisors (408255697900).

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

331020312020 is a wasteful number, since it uses less digits than its factorization.

331020312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289192 (or 4289190 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 331020312020 its reverse (20213020133), we get a palindrome (351233332153).

The spelling of 331020312020 in words is "three hundred thirty-one billion, twenty million, three hundred twelve thousand, twenty".