21110200 has 48 divisors (see below), whose sum is σ = 49941000. Its totient is φ = 8296320.

The previous prime is 21110189. The next prime is 21110227. The reversal of 21110200 is 201112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10906 + ... + 12694.

Almost surely, 2^21110200 is an apocalyptic number.

21110200 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 21110200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24970500).

21110200 is an abundant number, since it is smaller than the sum of its proper divisors (28830800).

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

21110200 is a wasteful number, since it uses less digits than its factorization.

21110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864 (or 1855 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 21110200 is about 4594.5837678728. The cubic root of 21110200 is about 276.3741687048.

Adding to 21110200 its reverse (201112), we get a palindrome (21311312).

The spelling of 21110200 in words is "twenty-one million, one hundred ten thousand, two hundred".