201221201102201 has 12 divisors (see below), whose sum is σ = 230865382837248. Its totient is φ = 171804204659712.

The previous prime is 201221201102189. The next prime is 201221201102227. The reversal of 201221201102201 is 102201102122102.

201221201102201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-201221201102201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201221201102201.

It is not an unprimeable number, because it can be changed into a prime (201221201102401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217147961 + ... + 218072646.

It is an arithmetic number, because the mean of its divisors is an integer number (19238781903104).

Almost surely, 2^{201221201102201} is an apocalyptic number.

It is an amenable number.

201221201102201 is a deficient number, since it is larger than the sum of its proper divisors (29644181735047).

201221201102201 is an frugal number, since it uses more digits than its factorization.

201221201102201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435221128 (or 435220871 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201221201102201 its reverse (102201102122102), we get a palindrome (303422303224303).

The spelling of 201221201102201 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred one million, one hundred two thousand, two hundred one".