331021323220 has 24 divisors (see below), whose sum is σ = 794451176064. Its totient is φ = 113493025056.

The previous prime is 331021323211. The next prime is 331021323253. The reversal of 331021323220 is 22323120133.

It is a super-2 number, since 2×331021323220² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331021323191 and 331021323200.

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 7 ways as a sum of consecutive naturals, for example, 1182218872 + ... + 1182219151.

It is an arithmetic number, because the mean of its divisors is an integer number (33102132336).

Almost surely, 2^331021323220 is an apocalyptic number.

It is an amenable number.

331021323220 is an abundant number, since it is smaller than the sum of its proper divisors (463429852844).

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

331021323220 is a wasteful number, since it uses less digits than its factorization.

331021323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364438039 (or 2364438037 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 331021323220 its reverse (22323120133), we get a palindrome (353344443353).

The spelling of 331021323220 in words is "three hundred thirty-one billion, twenty-one million, three hundred twenty-three thousand, two hundred twenty".