21222000200 has 96 divisors (see below), whose sum is σ = 49778168160. Its totient is φ = 8413977600.

The previous prime is 21222000197. The next prime is 21222000209. The reversal of 21222000200 is 200022212.

It is not an unprimeable number, because it can be changed into a prime (21222000209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11941712 + ... + 11943488.

It is an arithmetic number, because the mean of its divisors is an integer number (518522585).

Almost surely, 2^21222000200 is an apocalyptic number.

21222000200 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 21222000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24889084080).

21222000200 is an abundant number, since it is smaller than the sum of its proper divisors (28556167960).

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

21222000200 is a wasteful number, since it uses less digits than its factorization.

21222000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287 (or 2278 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 21222000200 its reverse (200022212), we get a palindrome (21422022412).

The spelling of 21222000200 in words is "twenty-one billion, two hundred twenty-two million, two hundred", and thus it is an aban number.