21222000200208 has 160 divisors (see below), whose sum is σ = 56889773107200. Its totient is φ = 6808912201728.

The previous prime is 21222000200207. The next prime is 21222000200213. The reversal of 21222000200208 is 80200200022212.

It is not an unprimeable number, because it can be changed into a prime (21222000200207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1494815766 + ... + 1494829962.

It is an arithmetic number, because the mean of its divisors is an integer number (355561081920).

Almost surely, 2^{21222000200208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21222000200208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28444886553600).

21222000200208 is an abundant number, since it is smaller than the sum of its proper divisors (35667772906992).

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

21222000200208 is a wasteful number, since it uses less digits than its factorization.

21222000200208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17489 (or 17483 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The spelling of 21222000200208 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred thousand, two hundred eight".