11111109999959 has 2 divisors, whose sum is σ = 11111109999960. Its totient is φ = 11111109999958.

The previous prime is 11111109999937. The next prime is 11111109999991. The reversal of 11111109999959 is 95999990111111.

11111109999959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111109999959 - 2⁴⁰ = 10011598372183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111109999895 and 11111109999904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111109299959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555554999979 + 5555554999980.

It is an arithmetic number, because the mean of its divisors is an integer number (5555554999980).

Almost surely, 2^{11111109999959} is an apocalyptic number.

11111109999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111109999959 is an equidigital number, since it uses as much as digits as its factorization.

11111109999959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2657205, while the sum is 65.

The spelling of 11111109999959 in words is "eleven trillion, one hundred eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred fifty-nine".