111111159999999 has 4 divisors (see below), whose sum is σ = 148148213333336. Its totient is φ = 74074106666664.

The previous prime is 111111159999997. The next prime is 111111160000007. The reversal of 111111159999999 is 999999951111111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 111111159999999 - 2¹ = 111111159999997 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111111159999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111159999991) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18518526666664 + ... + 18518526666669.

It is an arithmetic number, because the mean of its divisors is an integer number (37037053333334).

Almost surely, 2^{111111159999999} is an apocalyptic number.

111111159999999 is a deficient number, since it is larger than the sum of its proper divisors (37037053333337).

111111159999999 is an equidigital number, since it uses as much as digits as its factorization.

111111159999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37037053333336.

The product of its digits is 23914845, while the sum is 75.

The spelling of 111111159999999 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".