221101222200 has 192 divisors, whose sum is σ = 697542541920. Its totient is φ = 57919488000.

The previous prime is 221101222187. The next prime is 221101222207. The reversal of 221101222200 is 2222101122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221101222200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101222207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32241172 + ... + 32248028.

Almost surely, 2^221101222200 is an apocalyptic number.

221101222200 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 221101222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348771270960).

221101222200 is an abundant number, since it is smaller than the sum of its proper divisors (476441319720).

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

221101222200 is a wasteful number, since it uses less digits than its factorization.

221101222200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7818 (or 7809 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221101222200 its reverse (2222101122), we get a palindrome (223323323322).

The spelling of 221101222200 in words is "two hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, two hundred".