201200001220221 has 16 divisors (see below), whose sum is σ = 272076781784640. Its totient is φ = 132230104801920.

The previous prime is 201200001220193. The next prime is 201200001220223. The reversal of 201200001220221 is 122022100002102.

It is not a de Polignac number, because 201200001220221 - 2¹⁰ = 201200001219197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201200001220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200001220223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227983626 + ... + 228864443.

It is an arithmetic number, because the mean of its divisors is an integer number (17004798861540).

Almost surely, 2^{201200001220221} is an apocalyptic number.

It is an amenable number.

201200001220221 is a deficient number, since it is larger than the sum of its proper divisors (70876780564419).

201200001220221 is a wasteful number, since it uses less digits than its factorization.

201200001220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456850156.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 201200001220221 its reverse (122022100002102), we get a palindrome (323222101222323).

The spelling of 201200001220221 in words is "two hundred one trillion, two hundred billion, one million, two hundred twenty thousand, two hundred twenty-one".