331021220100 has 72 divisors (see below), whose sum is σ = 965296217088. Its totient is φ = 87577257600.

The previous prime is 331021220083. The next prime is 331021220111. The reversal of 331021220100 is 1022120133.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 331021220100.

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 23 ways as a sum of consecutive naturals, for example, 4306011 + ... + 4382210.

It is an arithmetic number, because the mean of its divisors is an integer number (13406891904).

Almost surely, 2^331021220100 is an apocalyptic number.

331021220100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

331021220100 is an abundant number, since it is smaller than the sum of its proper divisors (634274996988).

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

331021220100 is a wasteful number, since it uses less digits than its factorization.

331021220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688365 (or 8688358 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 331021220100 its reverse (1022120133), we get a palindrome (332043340233).

The spelling of 331021220100 in words is "three hundred thirty-one billion, twenty-one million, two hundred twenty thousand, one hundred".