11123111011 has 4 divisors (see below), whose sum is σ = 11127160000. Its totient is φ = 11119062024.

The previous prime is 11123111009. The next prime is 11123111017. The reversal of 11123111011 is 11011132111.

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 11123111011 - 2¹ = 11123111009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123110982 and 11123111000.

It is not an unprimeable number, because it can be changed into a prime (11123111017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020371 + ... + 2025868.

It is an arithmetic number, because the mean of its divisors is an integer number (2781790000).

Almost surely, 2^11123111011 is an apocalyptic number.

11123111011 is a deficient number, since it is larger than the sum of its proper divisors (4048989).

11123111011 is an equidigital number, since it uses as much as digits as its factorization.

11123111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048988.

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

Adding to 11123111011 its reverse (11011132111), we get a palindrome (22134243122).

The spelling of 11123111011 in words is "eleven billion, one hundred twenty-three million, one hundred eleven thousand, eleven".