211200021200 has 120 divisors (see below), whose sum is σ = 593381181888. Its totient is φ = 70727408640.

The previous prime is 211200021167. The next prime is 211200021209. The reversal of 211200021200 is 2120002112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 756677 + ... + 997476.

Almost surely, 2^211200021200 is an apocalyptic number.

211200021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211200021200 is an abundant number, since it is smaller than the sum of its proper divisors (382181160688).

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

211200021200 is a wasteful number, since it uses less digits than its factorization.

211200021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754221 (or 1754210 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 211200021200 its reverse (2120002112), we get a palindrome (213320023312).

The spelling of 211200021200 in words is "two hundred eleven billion, two hundred million, twenty-one thousand, two hundred".