21210122200200 has 192 divisors, whose sum is σ = 65843643683520. Its totient is φ = 5648100480000.

The previous prime is 21210122200193. The next prime is 21210122200247. The reversal of 21210122200200 is 200222101212.

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 21210122200200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2142215250 + ... + 2142225150.

It is an arithmetic number, because the mean of its divisors is an integer number (342935644185).

Almost surely, 2^{21210122200200} is an apocalyptic number.

21210122200200 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 21210122200200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32921821841760).

21210122200200 is an abundant number, since it is smaller than the sum of its proper divisors (44633521483320).

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

21210122200200 is a wasteful number, since it uses less digits than its factorization.

21210122200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14568 (or 14559 counting only the distinct ones).

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

Adding to 21210122200200 its reverse (200222101212), we get a palindrome (21410344301412).

The spelling of 21210122200200 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-two million, two hundred thousand, two hundred".