221022222200 has 72 divisors (see below), whose sum is σ = 556446416400. Its totient is φ = 81608192640.

The previous prime is 221022222199. The next prime is 221022222209. The reversal of 221022222200 is 2222220122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022222209) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3235760 + ... + 3303359.

It is an arithmetic number, because the mean of its divisors is an integer number (7728422450).

Almost surely, 2^221022222200 is an apocalyptic number.

221022222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022222200 is an abundant number, since it is smaller than the sum of its proper divisors (335424194200).

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

221022222200 is a wasteful number, since it uses less digits than its factorization.

221022222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6539161 (or 6539139 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 221022222200 its reverse (2222220122), we get a palindrome (223244442322).

The spelling of 221022222200 in words is "two hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, two hundred".