221000222200 has 24 divisors (see below), whose sum is σ = 513825517080. Its totient is φ = 88400088800.

The previous prime is 221000222129. The next prime is 221000222203. The reversal of 221000222200 is 2222000122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000222203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 552500356 + ... + 552500755.

It is an arithmetic number, because the mean of its divisors is an integer number (21409396545).

Almost surely, 2^221000222200 is an apocalyptic number.

221000222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221000222200 is an abundant number, since it is smaller than the sum of its proper divisors (292825294880).

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

221000222200 is a wasteful number, since it uses less digits than its factorization.

221000222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105001127 (or 1105001118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 221000222200 its reverse (2222000122), we get a palindrome (223222222322).

The spelling of 221000222200 in words is "two hundred twenty-one billion, two hundred twenty-two thousand, two hundred".