11123111111 has 8 divisors (see below), whose sum is σ = 12712855200. Its totient is φ = 9533549088.

The previous prime is 11123111093. The next prime is 11123111117. The reversal of 11123111111 is 11111132111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11123111111 - 2²² = 11118916807 is a prime.

It is a Duffinian number.

11123111111 is a modest number, since divided by 111111 gives 11123 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123111117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131105 + ... + 198581.

It is an arithmetic number, because the mean of its divisors is an integer number (1589106900).

Almost surely, 2^11123111111 is an apocalyptic number.

11123111111 is a deficient number, since it is larger than the sum of its proper divisors (1589744089).

11123111111 is an equidigital number, since it uses as much as digits as its factorization.

11123111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91033.

The product of its digits is 6, while the sum is 14.

Adding to 11123111111 its reverse (11111132111), we get a palindrome (22234243222).

The spelling of 11123111111 in words is "eleven billion, one hundred twenty-three million, one hundred eleven thousand, one hundred eleven".