201221000200 has 192 divisors, whose sum is σ = 517551249600. Its totient is φ = 72145305600.

The previous prime is 201221000153. The next prime is 201221000203. The reversal of 201221000200 is 2000122102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (201221000203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140418684 + ... + 140420116.

It is an arithmetic number, because the mean of its divisors is an integer number (2695579425).

Almost surely, 2^201221000200 is an apocalyptic number.

201221000200 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 201221000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258775624800).

201221000200 is an abundant number, since it is smaller than the sum of its proper divisors (316330249400).

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

201221000200 is a wasteful number, since it uses less digits than its factorization.

201221000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201221000200 its reverse (2000122102), we get a palindrome (203221122302).

The spelling of 201221000200 in words is "two hundred one billion, two hundred twenty-one million, two hundred", and thus it is an aban number.