111001009999 has 48 divisors (see below), whose sum is σ = 132338787840. Its totient is φ = 92726726400.

The previous prime is 111001009993. The next prime is 111001010017. The reversal of 111001009999 is 999900100111.

It is not a de Polignac number, because 111001009999 - 2⁷ = 111001009871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001009993) 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 47 ways as a sum of consecutive naturals, for example, 12205444 + ... + 12214534.

It is an arithmetic number, because the mean of its divisors is an integer number (2757058080).

Almost surely, 2^111001009999 is an apocalyptic number.

111001009999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

111001009999 is a deficient number, since it is larger than the sum of its proper divisors (21337777841).

111001009999 is a wasteful number, since it uses less digits than its factorization.

111001009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9292 (or 9281 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 111001009999 in words is "one hundred eleven billion, one million, nine thousand, nine hundred ninety-nine".