201221101110211 has 12 divisors (see below), whose sum is σ = 249017491147152. Its totient is φ = 159207904174176.

The previous prime is 201221101110209. The next prime is 201221101110229. The reversal of 201221101110211 is 112011101122102.

It is not a de Polignac number, because 201221101110211 - 2¹ = 201221101110209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201221101110311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85046956176 + ... + 85046958541.

It is an arithmetic number, because the mean of its divisors is an integer number (20751457595596).

Almost surely, 2^{201221101110211} is an apocalyptic number.

201221101110211 is a deficient number, since it is larger than the sum of its proper divisors (47796390036941).

201221101110211 is a wasteful number, since it uses less digits than its factorization.

201221101110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170093914750 (or 170093914737 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 201221101110211 its reverse (112011101122102), we get a palindrome (313232202232313).

The spelling of 201221101110211 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred one million, one hundred ten thousand, two hundred eleven".