12110110111 has 4 divisors (see below), whose sum is σ = 13211029224. Its totient is φ = 11009191000.

The previous prime is 12110110109. The next prime is 12110110139. The reversal of 12110110111 is 11101101121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11101101121 = 11 ⋅1009191011.

It is a cyclic number.

It is not a de Polignac number, because 12110110111 - 2¹ = 12110110109 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 (12110110211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550459540 + ... + 550459561.

It is an arithmetic number, because the mean of its divisors is an integer number (3302757306).

Almost surely, 2^12110110111 is an apocalyptic number.

12110110111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12110110111 is a deficient number, since it is larger than the sum of its proper divisors (1100919113).

12110110111 is a wasteful number, since it uses less digits than its factorization.

12110110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100919112.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 12110110111 its reverse (11101101121), we get a palindrome (23211211232).

It can be divided in two parts, 12110 and 110111, that added together give a palindrome (122221).

The spelling of 12110110111 in words is "twelve billion, one hundred ten million, one hundred ten thousand, one hundred eleven".