21002210200 has 24 divisors (see below), whose sum is σ = 48830139180. Its totient is φ = 8400884000.

The previous prime is 21002210197. The next prime is 21002210209. The reversal of 21002210200 is 201220012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002210209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52505326 + ... + 52505725.

Almost surely, 2^21002210200 is an apocalyptic number.

21002210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002210200 is an abundant number, since it is smaller than the sum of its proper divisors (27827928980).

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

21002210200 is a wasteful number, since it uses less digits than its factorization.

21002210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105011067 (or 105011058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21002210200 its reverse (201220012), we get a palindrome (21203430212).

The spelling of 21002210200 in words is "twenty-one billion, two million, two hundred ten thousand, two hundred".