11111111000123 has 2 divisors, whose sum is σ = 11111111000124. Its totient is φ = 11111111000122.

The previous prime is 11111111000113. The next prime is 11111111000167. The reversal of 11111111000123 is 32100011111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111111000123 - 2⁸ = 11111110999867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111111000098 and 11111111000107.

It is not a weakly prime, because it can be changed into another prime (11111111000113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555500061 + 5555555500062.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555500062).

Almost surely, 2^{11111111000123} is an apocalyptic number.

11111111000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111111000123 is an equidigital number, since it uses as much as digits as its factorization.

11111111000123 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11111111000123 its reverse (32100011111111), we get a palindrome (43211122111234).

The spelling of 11111111000123 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty-three", and thus it is an aban number.