201111121221201 has 12 divisors (see below), whose sum is σ = 296674561802112. Its totient is φ = 131221440796536.

The previous prime is 201111121221169. The next prime is 201111121221229. The reversal of 201111121221201 is 102122121111102.

It is a happy number.

201111121221201 is a `hidden beast` number, since 20 + 111 + 112 + 1 + 221 + 201 = 666.

It is not a de Polignac number, because 201111121221201 - 2⁵ = 201111121221169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201111121221301) 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, 237720001021 + ... + 237720001866.

It is an arithmetic number, because the mean of its divisors is an integer number (24722880150176).

Almost surely, 2^{201111121221201} is an apocalyptic number.

It is an amenable number.

201111121221201 is a deficient number, since it is larger than the sum of its proper divisors (95563440580911).

201111121221201 is a wasteful number, since it uses less digits than its factorization.

201111121221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475440002940 (or 475440002937 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 201111121221201 its reverse (102122121111102), we get a palindrome (303233242332303).

The spelling of 201111121221201 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred one".