331011322020 has 72 divisors (see below), whose sum is σ = 1006304153400. Its totient is φ = 88073072640.

The previous prime is 331011322009. The next prime is 331011322021. The reversal of 331011322020 is 20223110133.

331011322020 is a `hidden beast` number, since 3 + 310 + 11 + 322 + 0 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58420823616 + 272590498404 = 241704^2 + 522102^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 331011321984 and 331011322002.

It is not an unprimeable number, because it can be changed into a prime (331011322021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1967011 + ... + 2128650.

It is an arithmetic number, because the mean of its divisors is an integer number (13976446575).

Almost surely, 2^331011322020 is an apocalyptic number.

331011322020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331011322020 is an abundant number, since it is smaller than the sum of its proper divisors (675292831380).

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

331011322020 is a wasteful number, since it uses less digits than its factorization.

331011322020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096125 (or 4096120 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 331011322020 its reverse (20223110133), we get a palindrome (351234432153).

The spelling of 331011322020 in words is "three hundred thirty-one billion, eleven million, three hundred twenty-two thousand, twenty".