11101111123 has 4 divisors (see below), whose sum is σ = 11101792600. Its totient is φ = 11100429648.

The previous prime is 11101111117. The next prime is 11101111127. The reversal of 11101111123 is 32111110111.

11101111123 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.

It is a cyclic number.

It is not a de Polignac number, because 11101111123 - 2⁹ = 11101110611 is a prime.

It is a super-2 number, since 2×11101111123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101111127) 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, 315690 + ... + 349087.

It is an arithmetic number, because the mean of its divisors is an integer number (2775448150).

Almost surely, 2^11101111123 is an apocalyptic number.

11101111123 is a deficient number, since it is larger than the sum of its proper divisors (681477).

11101111123 is an equidigital number, since it uses as much as digits as its factorization.

11101111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681476.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11101111123 its reverse (32111110111), we get a palindrome (43212221234).

The spelling of 11101111123 in words is "eleven billion, one hundred one million, one hundred eleven thousand, one hundred twenty-three".