21001112210200 has 24 divisors (see below), whose sum is σ = 48827585889180. Its totient is φ = 8400444884000.

The previous prime is 21001112210159. The next prime is 21001112210251. The reversal of 21001112210200 is 201221110012.

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, 52502780326 + ... + 52502780725.

Almost surely, 2^{21001112210200} is an apocalyptic number.

21001112210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001112210200 is an abundant number, since it is smaller than the sum of its proper divisors (27826473678980).

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

21001112210200 is a wasteful number, since it uses less digits than its factorization.

21001112210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105005561067 (or 105005561058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21001112210200 its reverse (201221110012), we get a palindrome (21202333320212).

The spelling of 21001112210200 in words is "twenty-one trillion, one billion, one hundred twelve million, two hundred ten thousand, two hundred".