201112101 has 6 divisors (see below), whose sum is σ = 290495270. Its totient is φ = 134074728.

The previous prime is 201112099. The next prime is 201112111. The reversal of 201112101 is 101211102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 200930625 + 181476 = 14175^2 + 426^2 .

It is not a de Polignac number, because 201112101 - 2¹ = 201112099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 22345789 = 201112101 / (2 + 0 + 1 + 1 + 1 + 2 + 1 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11172886 + ... + 11172903.

Almost surely, 2^201112101 is an apocalyptic number.

It is an amenable number.

201112101 is a deficient number, since it is larger than the sum of its proper divisors (89383169).

201112101 is a wasteful number, since it uses less digits than its factorization.

201112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22345795 (or 22345792 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 201112101 is about 14181.3998251230. The cubic root of 201112101 is about 585.8854791021.

Adding to 201112101 its reverse (101211102), we get a palindrome (302323203).

Subtracting from 201112101 its reverse (101211102), we obtain a palindrome (99900999).

The spelling of 201112101 in words is "two hundred one million, one hundred twelve thousand, one hundred one".