11123122123 has 4 divisors (see below), whose sum is σ = 11136102120. Its totient is φ = 11110142128.

The previous prime is 11123122039. The next prime is 11123122141. The reversal of 11123122123 is 32122132111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123122123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11123122123.

It is not an unprimeable number, because it can be changed into a prime (11123122193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6488713 + ... + 6490426.

It is an arithmetic number, because the mean of its divisors is an integer number (2784025530).

Almost surely, 2^11123122123 is an apocalyptic number.

11123122123 is a deficient number, since it is larger than the sum of its proper divisors (12979997).

11123122123 is an equidigital number, since it uses as much as digits as its factorization.

11123122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12979996.

The product of its digits is 144, while the sum is 19.

Adding to 11123122123 its reverse (32122132111), we get a palindrome (43245254234).

The spelling of 11123122123 in words is "eleven billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred twenty-three".