221222022200 has 96 divisors (see below), whose sum is σ = 523679763600. Its totient is φ = 86885744640.

The previous prime is 221222022199. The next prime is 221222022271. The reversal of 221222022200 is 2220222122.

It is a congruent number.

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, 10337912 + ... + 10359288.

Almost surely, 2^221222022200 is an apocalyptic number.

221222022200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221222022200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261839881800).

221222022200 is an abundant number, since it is smaller than the sum of its proper divisors (302457741400).

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

221222022200 is a wasteful number, since it uses less digits than its factorization.

221222022200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22329 (or 22320 counting only the distinct ones).

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

Adding to 221222022200 its reverse (2220222122), we get a palindrome (223442244322).

The spelling of 221222022200 in words is "two hundred twenty-one billion, two hundred twenty-two million, twenty-two thousand, two hundred".