201221002101201 has 12 divisors (see below), whose sum is σ = 277865228430192. Its totient is φ = 129521564569264.

The previous prime is 201221002101199. The next prime is 201221002101247. The reversal of 201221002101201 is 102101200122102.

It is not a de Polignac number, because 201221002101201 - 2¹ = 201221002101199 is a prime.

It is a super-2 number, since 2×201221002101201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201221002101271) 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, 39877326471 + ... + 39877331516.

It is an arithmetic number, because the mean of its divisors is an integer number (23155435702516).

Almost surely, 2^{201221002101201} is an apocalyptic number.

It is an amenable number.

201221002101201 is a deficient number, since it is larger than the sum of its proper divisors (76644226328991).

201221002101201 is an equidigital number, since it uses as much as digits as its factorization.

201221002101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79754658048 (or 79754658019 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201221002101201 its reverse (102101200122102), we get a palindrome (303322202223303).

The spelling of 201221002101201 in words is "two hundred one trillion, two hundred twenty-one billion, two million, one hundred one thousand, two hundred one".