201112001 has 4 divisors (see below), whose sum is σ = 201186900. Its totient is φ = 201037104.

The previous prime is 201111991. The next prime is 201112019. The reversal of 201112001 is 100211102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123654400 + 77457601 = 11120^2 + 8801^2 .

It is a cyclic number.

It is not a de Polignac number, because 201112001 - 2²⁶ = 134003137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201112001.

It is not an unprimeable number, because it can be changed into a prime (201112031) 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 3 ways as a sum of consecutive naturals, for example, 33266 + ... + 38843.

It is an arithmetic number, because the mean of its divisors is an integer number (50296725).

Almost surely, 2^201112001 is an apocalyptic number.

It is an amenable number.

201112001 is a deficient number, since it is larger than the sum of its proper divisors (74899).

201112001 is an equidigital number, since it uses as much as digits as its factorization.

201112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74898.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 201112001 is about 14181.3962993776. The cubic root of 201112001 is about 585.8853819945.

Adding to 201112001 its reverse (100211102), we get a palindrome (301323103).

The spelling of 201112001 in words is "two hundred one million, one hundred twelve thousand, one".