201221310200 has 48 divisors (see below), whose sum is σ = 472471668360. Its totient is φ = 79691600000.

The previous prime is 201221310181. The next prime is 201221310221. The reversal of 201221310200 is 2013122102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4960526 + ... + 5000925.

Almost surely, 2^201221310200 is an apocalyptic number.

201221310200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221310200 is an abundant number, since it is smaller than the sum of its proper divisors (271250358160).

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

201221310200 is a wasteful number, since it uses less digits than its factorization.

201221310200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961568 (or 9961559 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 201221310200 its reverse (2013122102), we get a palindrome (203234432302).

The spelling of 201221310200 in words is "two hundred one billion, two hundred twenty-one million, three hundred ten thousand, two hundred".