331212320020 has 24 divisors (see below), whose sum is σ = 696335404968. Its totient is φ = 132334540800.

The previous prime is 331212320003. The next prime is 331212320053. The reversal of 331212320020 is 20023212133.

It can be written as a sum of positive squares in 4 ways, for example, as 11057784336 + 320154535684 = 105156^2 + 565822^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 331212320020.

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, 9381141 + ... + 9416380.

It is an arithmetic number, because the mean of its divisors is an integer number (29013975207).

Almost surely, 2^331212320020 is an apocalyptic number.

It is an amenable number.

331212320020 is an abundant number, since it is smaller than the sum of its proper divisors (365123084948).

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

331212320020 is a wasteful number, since it uses less digits than its factorization.

331212320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18798411 (or 18798409 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 331212320020 its reverse (20023212133), we get a palindrome (351235532153).

The spelling of 331212320020 in words is "three hundred thirty-one billion, two hundred twelve million, three hundred twenty thousand, twenty".