331021232220 has 96 divisors (see below), whose sum is σ = 1072676505600. Its totient is φ = 74704241664.

The previous prime is 331021232219. The next prime is 331021232249. The reversal of 331021232220 is 22232120133.

It is a happy number.

It is a super-2 number, since 2×331021232220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4955085 + ... + 5021444.

It is an arithmetic number, because the mean of its divisors is an integer number (11173713600).

Almost surely, 2^331021232220 is an apocalyptic number.

331021232220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331021232220 is an abundant number, since it is smaller than the sum of its proper divisors (741655273380).

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

331021232220 is a wasteful number, since it uses less digits than its factorization.

331021232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9976627 (or 9976625 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 331021232220 its reverse (22232120133), we get a palindrome (353253352353).

The spelling of 331021232220 in words is "three hundred thirty-one billion, twenty-one million, two hundred thirty-two thousand, two hundred twenty".