21110200200 has 288 divisors, whose sum is σ = 73912650240. Its totient is φ = 5393433600.

The previous prime is 21110200159. The next prime is 21110200217. The reversal of 21110200200 is 200201112.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5745564 + ... + 5749236.

Almost surely, 2^21110200200 is an apocalyptic number.

21110200200 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 21110200200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36956325120).

21110200200 is an abundant number, since it is smaller than the sum of its proper divisors (52802450040).

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

21110200200 is a wasteful number, since it uses less digits than its factorization.

21110200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3817 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21110200200 its reverse (200201112), we get a palindrome (21310401312).

The spelling of 21110200200 in words is "twenty-one billion, one hundred ten million, two hundred thousand, two hundred".