11111100122123 has 4 divisors (see below), whose sum is σ = 11382102564168. Its totient is φ = 10840097680080.

The previous prime is 11111100122117. The next prime is 11111100122173. The reversal of 11111100122123 is 32122100111111.

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 11111100122123 - 2²⁶ = 11111033013259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111100122173) 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, 135501220961 + ... + 135501221042.

It is an arithmetic number, because the mean of its divisors is an integer number (2845525641042).

Almost surely, 2^{11111100122123} is an apocalyptic number.

11111100122123 is a deficient number, since it is larger than the sum of its proper divisors (271002442045).

11111100122123 is an equidigital number, since it uses as much as digits as its factorization.

11111100122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271002442044.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 11111100122123 its reverse (32122100111111), we get a palindrome (43233200233234).

The spelling of 11111100122123 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred twenty-two thousand, one hundred twenty-three".