111101111009 has 4 divisors (see below), whose sum is σ = 126972698304. Its totient is φ = 95229523716.

The previous prime is 111101111003. The next prime is 111101111039. The reversal of 111101111009 is 900111101111.

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: 900111101111 = 167 ⋅5389886833.

It is a cyclic number.

It is not a de Polignac number, because 111101111009 - 2⁸ = 111101110753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111101111003) 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 3 ways as a sum of consecutive naturals, for example, 7935793637 + ... + 7935793650.

It is an arithmetic number, because the mean of its divisors is an integer number (31743174576).

Almost surely, 2^111101111009 is an apocalyptic number.

It is an amenable number.

111101111009 is a deficient number, since it is larger than the sum of its proper divisors (15871587295).

111101111009 is an equidigital number, since it uses as much as digits as its factorization.

111101111009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15871587294.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 111101111009 in words is "one hundred eleven billion, one hundred one million, one hundred eleven thousand, nine".