201221210210200 has 24 divisors (see below), whose sum is σ = 467839313739180. Its totient is φ = 80488484084000.

The previous prime is 201221210210183. The next prime is 201221210210203. The reversal of 201221210210200 is 2012012122102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221210210203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 503053025326 + ... + 503053025725.

Almost surely, 2^{201221210210200} is an apocalyptic number.

201221210210200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221210210200 is an abundant number, since it is smaller than the sum of its proper divisors (266618103528980).

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

201221210210200 is a wasteful number, since it uses less digits than its factorization.

201221210210200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006106051067 (or 1006106051058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201221210210200 its reverse (2012012122102), we get a palindrome (203233222332302).

The spelling of 201221210210200 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred ten million, two hundred ten thousand, two hundred".