201221021222200 has 96 divisors (see below), whose sum is σ = 534676594757760. Its totient is φ = 68989600483200.

The previous prime is 201221021222189. The next prime is 201221021222209. The reversal of 201221021222200 is 2222120122102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221021222209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 256607919 + ... + 257390881.

It is an arithmetic number, because the mean of its divisors is an integer number (5569547862060).

Almost surely, 2^{201221021222200} is an apocalyptic number.

201221021222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201221021222200 is an abundant number, since it is smaller than the sum of its proper divisors (333455573535560).

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

201221021222200 is a wasteful number, since it uses less digits than its factorization.

201221021222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966557 (or 966548 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 201221021222200 its reverse (2222120122102), we get a palindrome (203443141344302).

The spelling of 201221021222200 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred".