111099120987 has 16 divisors (see below), whose sum is σ = 156980764800. Its totient is φ = 69649276032.

The previous prime is 111099120967. The next prime is 111099121033. The reversal of 111099120987 is 789021990111.

It is not a de Polignac number, because 111099120987 - 2⁷ = 111099120859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111099120947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877237 + ... + 995862.

It is an arithmetic number, because the mean of its divisors is an integer number (9811297800).

Almost surely, 2^111099120987 is an apocalyptic number.

111099120987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

111099120987 is a deficient number, since it is larger than the sum of its proper divisors (45881643813).

111099120987 is a wasteful number, since it uses less digits than its factorization.

111099120987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874282.

The product of its (nonzero) digits is 81648, while the sum is 48.

The spelling of 111099120987 in words is "one hundred eleven billion, ninety-nine million, one hundred twenty thousand, nine hundred eighty-seven".