11133123111 has 32 divisors (see below), whose sum is σ = 18220723200. Its totient is φ = 6661923840.

The previous prime is 11133123107. The next prime is 11133123143. The reversal of 11133123111 is 11132133111.

It is not a de Polignac number, because 11133123111 - 2² = 11133123107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133123151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213786 + ... + 260711.

It is an arithmetic number, because the mean of its divisors is an integer number (569397600).

Almost surely, 2^11133123111 is an apocalyptic number.

11133123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11133123111 is a deficient number, since it is larger than the sum of its proper divisors (7087600089).

11133123111 is a wasteful number, since it uses less digits than its factorization.

11133123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474596 (or 474590 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11133123111 its reverse (11132133111), we get a palindrome (22265256222).

The spelling of 11133123111 in words is "eleven billion, one hundred thirty-three million, one hundred twenty-three thousand, one hundred eleven".