111109999999 has 4 divisors (see below), whose sum is σ = 111179142864. Its totient is φ = 111040857136.

The previous prime is 111109999969. The next prime is 111110000011. The reversal of 111109999999 is 999999901111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999999901111 = 113 ⋅8849556647.

It is a cyclic number.

It is not a de Polignac number, because 111109999999 - 2¹⁵ = 111109967231 is a prime.

It is a Duffinian number.

111109999999 is a modest number, since divided by 999999 gives 111109 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111109999919) 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, 34569022 + ... + 34572235.

It is an arithmetic number, because the mean of its divisors is an integer number (27794785716).

Almost surely, 2^111109999999 is an apocalyptic number.

111109999999 is a deficient number, since it is larger than the sum of its proper divisors (69142865).

111109999999 is an equidigital number, since it uses as much as digits as its factorization.

111109999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69142864.

The product of its (nonzero) digits is 4782969, while the sum is 67.

It can be divided in two parts, 1111099999 and 99, that multiplied together give a palindrome (109998899901).

The spelling of 111109999999 in words is "one hundred eleven billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".