210021012200 has 48 divisors (see below), whose sum is σ = 490061794380. Its totient is φ = 83705103360.

The previous prime is 210021012169. The next prime is 210021012217. The reversal of 210021012200 is 2210120012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7357179076 + 202663833124 = 85774^2 + 450182^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1840097 + ... + 1950896.

Almost surely, 2^210021012200 is an apocalyptic number.

210021012200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021012200 is an abundant number, since it is smaller than the sum of its proper divisors (280040782180).

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

210021012200 is a wasteful number, since it uses less digits than its factorization.

210021012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791286 (or 3791277 counting only the distinct ones).

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

Adding to 210021012200 its reverse (2210120012), we get a palindrome (212231132212).

The spelling of 210021012200 in words is "two hundred ten billion, twenty-one million, twelve thousand, two hundred".