21200011210200 has 192 divisors, whose sum is σ = 66781393529760. Its totient is φ = 5562710507520.

The previous prime is 21200011210139. The next prime is 21200011210211. The reversal of 21200011210200 is 201211000212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9015822 + ... + 11121378.

Almost surely, 2^{21200011210200} is an apocalyptic number.

21200011210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21200011210200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33390696764880).

21200011210200 is an abundant number, since it is smaller than the sum of its proper divisors (45581382319560).

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

21200011210200 is a wasteful number, since it uses less digits than its factorization.

21200011210200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105846 (or 2105837 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21200011210200 its reverse (201211000212), we get a palindrome (21401222210412).

The spelling of 21200011210200 in words is "twenty-one trillion, two hundred billion, eleven million, two hundred ten thousand, two hundred".