100111111123 has 2 divisors, whose sum is σ = 100111111124. Its totient is φ = 100111111122.

The previous prime is 100111111109. The next prime is 100111111153. The reversal of 100111111123 is 321111111001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100111111123 - 2⁹ = 100111110611 is a prime.

It is a super-2 number, since 2×100111111123² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100111111103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055555561 + 50055555562.

It is an arithmetic number, because the mean of its divisors is an integer number (50055555562).

Almost surely, 2^100111111123 is an apocalyptic number.

100111111123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100111111123 is an equidigital number, since it uses as much as digits as its factorization.

100111111123 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 13.

Adding to 100111111123 its reverse (321111111001), we get a palindrome (421222222124).

The spelling of 100111111123 in words is "one hundred billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-three".