1111111009 has 4 divisors (see below), whose sum is σ = 1111549120. Its totient is φ = 1110672900.

The previous prime is 1111110989. The next prime is 1111111031. The reversal of 1111111009 is 9001111111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9001111111 = 23 ⋅391352657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111111009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111110983 and 1111111001.

It is not an unprimeable number, because it can be changed into a prime (1111111409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215229 + ... + 220330.

It is an arithmetic number, because the mean of its divisors is an integer number (277887280).

Almost surely, 2^1111111009 is an apocalyptic number.

It is an amenable number.

1111111009 is a deficient number, since it is larger than the sum of its proper divisors (438111).

1111111009 is an equidigital number, since it uses as much as digits as its factorization.

1111111009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438110.

The product of its (nonzero) digits is 9, while the sum is 16.

The square root of 1111111009 is about 33333.3318016666. The cubic root of 1111111009 is about 1035.7441369230.

The spelling of 1111111009 in words is "one billion, one hundred eleven million, one hundred eleven thousand, nine".