21222020200200 has 96 divisors (see below), whose sum is σ = 66290463344160. Its totient is φ = 5616005324800.

The previous prime is 21222020200163. The next prime is 21222020200243. The reversal of 21222020200200 is 200202022212.

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 21222020200200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134921529 + ... + 135078728.

It is an arithmetic number, because the mean of its divisors is an integer number (690525659835).

Almost surely, 2^{21222020200200} is an apocalyptic number.

21222020200200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222020200200 is an abundant number, since it is smaller than the sum of its proper divisors (45068443143960).

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

21222020200200 is a wasteful number, since it uses less digits than its factorization.

21222020200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270000407 (or 270000398 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21222020200200 its reverse (200202022212), we get a palindrome (21422222222412).

The spelling of 21222020200200 in words is "twenty-one trillion, two hundred twenty-two billion, twenty million, two hundred thousand, two hundred".