221033411220 has 48 divisors (see below), whose sum is σ = 618927865920. Its totient is φ = 58938974976.

The previous prime is 221033411173. The next prime is 221033411233. The reversal of 221033411220 is 22114330122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107451 + ... + 1291709.

It is an arithmetic number, because the mean of its divisors is an integer number (12894330540).

Almost surely, 2^221033411220 is an apocalyptic number.

221033411220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221033411220 is an abundant number, since it is smaller than the sum of its proper divisors (397894454700).

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

221033411220 is a wasteful number, since it uses less digits than its factorization.

221033411220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204264 (or 204262 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221033411220 its reverse (22114330122), we get a palindrome (243147741342).

The spelling of 221033411220 in words is "two hundred twenty-one billion, thirty-three million, four hundred eleven thousand, two hundred twenty".