21110020200 has 96 divisors (see below), whose sum is σ = 72712310400. Its totient is φ = 5629337280.

The previous prime is 21110020159. The next prime is 21110020231. The reversal of 21110020200 is 202001112.

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 23 ways as a sum of consecutive naturals, for example, 1949232 + ... + 1960031.

It is an arithmetic number, because the mean of its divisors is an integer number (757419900).

Almost surely, 2^21110020200 is an apocalyptic number.

21110020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110020200 is an abundant number, since it is smaller than the sum of its proper divisors (51602290200).

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

21110020200 is a wasteful number, since it uses less digits than its factorization.

21110020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909288 (or 3909273 counting only the distinct ones).

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

Adding to 21110020200 its reverse (202001112), we get a palindrome (21312021312).

The spelling of 21110020200 in words is "twenty-one billion, one hundred ten million, twenty thousand, two hundred".