210221220200 has 48 divisors (see below), whose sum is σ = 501974201580. Its totient is φ = 81815823360.

The previous prime is 210221220047. The next prime is 210221220203. The reversal of 210221220200 is 2022122012.

It can be written as a sum of positive squares in 6 ways, for example, as 102680511844 + 107540708356 = 320438^2 + 327934^2 .

It is a super-2 number, since 2×210221220200² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210221220203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14196737 + ... + 14211536.

Almost surely, 2^210221220200 is an apocalyptic number.

210221220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221220200 is an abundant number, since it is smaller than the sum of its proper divisors (291752981380).

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

210221220200 is a wasteful number, since it uses less digits than its factorization.

210221220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28408326 (or 28408317 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 210221220200 its reverse (2022122012), we get a palindrome (212243342212).

The spelling of 210221220200 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty thousand, two hundred".