21210200011200 has 168 divisors, whose sum is σ = 69589224915760. Its totient is φ = 5655883161600.

The previous prime is 21210200011199. The next prime is 21210200011223. The reversal of 21210200011200 is 211000201212.

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 23 ways as a sum of consecutive naturals, for example, 317289780 + ... + 317356620.

Almost surely, 2^{21210200011200} is an apocalyptic number.

21210200011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210200011200 is an abundant number, since it is smaller than the sum of its proper divisors (48379024904560).

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

21210200011200 is a wasteful number, since it uses less digits than its factorization.

21210200011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132975 (or 132960 counting only the distinct ones).

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

Adding to 21210200011200 its reverse (211000201212), we get a palindrome (21421200212412).

The spelling of 21210200011200 in words is "twenty-one trillion, two hundred ten billion, two hundred million, eleven thousand, two hundred".