11181181105 has 4 divisors (see below), whose sum is σ = 13417417332. Its totient is φ = 8944944880.

The previous prime is 11181181103. The next prime is 11181181117. The reversal of 11181181105 is 50118118111.

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 5068443249 + 6112737856 = 71193^2 + 78184^2 .

It is not a de Polignac number, because 11181181105 - 2¹ = 11181181103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11181181103) 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, 1118118106 + ... + 1118118115.

It is an arithmetic number, because the mean of its divisors is an integer number (3354354333).

Almost surely, 2^11181181105 is an apocalyptic number.

It is an amenable number.

11181181105 is a deficient number, since it is larger than the sum of its proper divisors (2236236227).

11181181105 is an equidigital number, since it uses as much as digits as its factorization.

11181181105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236236226.

The product of its (nonzero) digits is 320, while the sum is 28.

Adding to 11181181105 its reverse (50118118111), we get a palindrome (61299299216).

The spelling of 11181181105 in words is "eleven billion, one hundred eighty-one million, one hundred eighty-one thousand, one hundred five".