221022234200 has 192 divisors, whose sum is σ = 535465728000. Its totient is φ = 84779136000.

The previous prime is 221022234187. The next prime is 221022234203. The reversal of 221022234200 is 2432220122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022234203) 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, 175553171 + ... + 175554429.

It is an arithmetic number, because the mean of its divisors is an integer number (2788884000).

Almost surely, 2^221022234200 is an apocalyptic number.

221022234200 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 221022234200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267732864000).

221022234200 is an abundant number, since it is smaller than the sum of its proper divisors (314443493800).

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

221022234200 is a wasteful number, since it uses less digits than its factorization.

221022234200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 221022234200 its reverse (2432220122), we get a palindrome (223454454322).

It can be divided in two parts, 2210222 and 34200, that added together give a palindrome (2244422).

The spelling of 221022234200 in words is "two hundred twenty-one billion, twenty-two million, two hundred thirty-four thousand, two hundred".