221332303220 has 72 divisors (see below), whose sum is σ = 540818197920. Its totient is φ = 75866414400.

The previous prime is 221332303177. The next prime is 221332303253. The reversal of 221332303220 is 22303233122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4226195 + ... + 4278245.

It is an arithmetic number, because the mean of its divisors is an integer number (7511363860).

Almost surely, 2^221332303220 is an apocalyptic number.

221332303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221332303220 is an abundant number, since it is smaller than the sum of its proper divisors (319485894700).

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

221332303220 is a wasteful number, since it uses less digits than its factorization.

221332303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56413 (or 56404 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 221332303220 its reverse (22303233122), we get a palindrome (243635536342).

The spelling of 221332303220 in words is "two hundred twenty-one billion, three hundred thirty-two million, three hundred three thousand, two hundred twenty".