111001009 has 16 divisors (see below), whose sum is σ = 131627520. Its totient is φ = 91586880.

The previous prime is 111001003. The next prime is 111001019. The reversal of 111001009 is 900100111.

It is not a de Polignac number, because 111001009 - 2³ = 111001001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111001009.

It is not an unprimeable number, because it can be changed into a prime (111001001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93399 + ... + 94579.

It is an arithmetic number, because the mean of its divisors is an integer number (8226720).

Almost surely, 2^111001009 is an apocalyptic number.

It is an amenable number.

111001009 is a deficient number, since it is larger than the sum of its proper divisors (20626511).

111001009 is a wasteful number, since it uses less digits than its factorization.

111001009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 111001009 is about 10535.7016377648. The cubic root of 111001009 is about 480.5910095669.

The spelling of 111001009 in words is "one hundred eleven million, one thousand, nine".