11111211133 has 4 divisors (see below), whose sum is σ = 12121321248. Its totient is φ = 10101101020.

The previous prime is 11111211127. The next prime is 11111211179. The reversal of 11111211133 is 33111211111.

11111211133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11111211133 - 2²⁵ = 11077656701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111211833) 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, 505055041 + ... + 505055062.

It is an arithmetic number, because the mean of its divisors is an integer number (3030330312).

Almost surely, 2^11111211133 is an apocalyptic number.

It is an amenable number.

11111211133 is a deficient number, since it is larger than the sum of its proper divisors (1010110115).

11111211133 is a wasteful number, since it uses less digits than its factorization.

11111211133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010110114.

The product of its digits is 18, while the sum is 16.

Adding to 11111211133 its reverse (33111211111), we get a palindrome (44222422244).

The spelling of 11111211133 in words is "eleven billion, one hundred eleven million, two hundred eleven thousand, one hundred thirty-three".