201118205 has 4 divisors (see below), whose sum is σ = 241341852. Its totient is φ = 160894560.

The previous prime is 201118193. The next prime is 201118207. The reversal of 201118205 is 502811102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502811102 = 2 ⋅251405551.

It can be written as a sum of positive squares in 2 ways, for example, as 34269316 + 166848889 = 5854^2 + 12917^2 .

It is not a de Polignac number, because 201118205 - 2¹⁴ = 201101821 is a prime.

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 (201118207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20111816 + ... + 20111825.

It is an arithmetic number, because the mean of its divisors is an integer number (60335463).

Almost surely, 2^201118205 is an apocalyptic number.

It is an amenable number.

201118205 is a deficient number, since it is larger than the sum of its proper divisors (40223647).

201118205 is an equidigital number, since it uses as much as digits as its factorization.

201118205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40223646.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 201118205 is about 14181.6150349669. The cubic root of 201118205 is about 585.8914064908.

Adding to 201118205 its reverse (502811102), we get a palindrome (703929307).

The spelling of 201118205 in words is "two hundred one million, one hundred eighteen thousand, two hundred five".