111111099999999 has 24 divisors (see below), whose sum is σ = 162977007483696. Its totient is φ = 67283614358400.

The previous prime is 111111099999997. The next prime is 111111100000007. The reversal of 111111099999999 is 999999990111111.

It is not a de Polignac number, because 111111099999999 - 2¹ = 111111099999997 is a prime.

111111099999999 is a modest number, since divided by 99999999 gives 1111110 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111099999997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127853272 + ... + 128719389.

It is an arithmetic number, because the mean of its divisors is an integer number (6790708645154).

Almost surely, 2^{111111099999999} is an apocalyptic number.

111111099999999 is a deficient number, since it is larger than the sum of its proper divisors (51865907483697).

111111099999999 is a wasteful number, since it uses less digits than its factorization.

111111099999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256573879 (or 256573868 counting only the distinct ones).

The product of its (nonzero) digits is 43046721, while the sum is 78.

The spelling of 111111099999999 in words is "one hundred eleven trillion, one hundred eleven billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".