21110202200 has 96 divisors (see below), whose sum is σ = 52186012560. Its totient is φ = 7914086400.

The previous prime is 21110202199. The next prime is 21110202227. The reversal of 21110202200 is 220201112.

It is a happy number.

It is a congruent number.

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, 806519 + ... + 832281.

Almost surely, 2^21110202200 is an apocalyptic number.

21110202200 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 21110202200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26093006280).

21110202200 is an abundant number, since it is smaller than the sum of its proper divisors (31075810360).

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

21110202200 is a wasteful number, since it uses less digits than its factorization.

21110202200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26037 (or 26028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21110202200 its reverse (220201112), we get a palindrome (21330403312).

The spelling of 21110202200 in words is "twenty-one billion, one hundred ten million, two hundred two thousand, two hundred".