201111221101221 has 12 divisors (see below), whose sum is σ = 290494327237920. Its totient is φ = 134073989922600.

The previous prime is 201111221101213. The next prime is 201111221101237. The reversal of 201111221101221 is 122101122111102.

It is a happy number.

201111221101221 is a `hidden beast` number, since 201 + 1 + 11 + 221 + 10 + 1 + 221 = 666.

It is not a de Polignac number, because 201111221101221 - 2³ = 201111221101213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201111221101194 and 201111221101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111221101121) 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, 4754151 + ... + 20611268.

It is an arithmetic number, because the mean of its divisors is an integer number (24207860603160).

Almost surely, 2^{201111221101221} is an apocalyptic number.

It is an amenable number.

201111221101221 is a deficient number, since it is larger than the sum of its proper divisors (89383106136699).

201111221101221 is a wasteful number, since it uses less digits than its factorization.

201111221101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26246376 (or 26246373 counting only the distinct ones).

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

Adding to 201111221101221 its reverse (122101122111102), we get a palindrome (323212343212323).

The spelling of 201111221101221 in words is "two hundred one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty-one".