21000210200 has 24 divisors (see below), whose sum is σ = 48825489180. Its totient is φ = 8400084000.

The previous prime is 21000210163. The next prime is 21000210221. The reversal of 21000210200 is 201200012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52500326 + ... + 52500725.

Almost surely, 2^21000210200 is an apocalyptic number.

21000210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000210200 is an abundant number, since it is smaller than the sum of its proper divisors (27825278980).

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

21000210200 is a wasteful number, since it uses less digits than its factorization.

21000210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105001067 (or 105001058 counting only the distinct ones).

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

Adding to 21000210200 its reverse (201200012), we get a palindrome (21201410212).

The spelling of 21000210200 in words is "twenty-one billion, two hundred ten thousand, two hundred".