201121122200221 has 12 divisors (see below), whose sum is σ = 207970209866016. Its totient is φ = 194490962879160.

The previous prime is 201121122200203. The next prime is 201121122200249. The reversal of 201121122200221 is 122002221121102.

It is not a de Polignac number, because 201121122200221 - 2¹⁵ = 201121122167453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121122201221) 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, 75234655 + ... + 77862028.

It is an arithmetic number, because the mean of its divisors is an integer number (17330850822168).

Almost surely, 2^{201121122200221} is an apocalyptic number.

It is an amenable number.

201121122200221 is a deficient number, since it is larger than the sum of its proper divisors (6849087665795).

201121122200221 is a wasteful number, since it uses less digits than its factorization.

201121122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153098112 (or 153098081 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201121122200221 its reverse (122002221121102), we get a palindrome (323123343321323).

The spelling of 201121122200221 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".