111111011009 has 8 divisors (see below), whose sum is σ = 111771172968. Its totient is φ = 110451358080.

The previous prime is 111111011003. The next prime is 111111011021. The reversal of 111111011009 is 900110111111.

It can be written as a sum of positive squares in 4 ways, for example, as 26234928784 + 84876082225 = 161972^2 + 291335^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111011009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111111011003) 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 7 ways as a sum of consecutive naturals, for example, 315149 + ... + 567045.

It is an arithmetic number, because the mean of its divisors is an integer number (13971396621).

Almost surely, 2^111111011009 is an apocalyptic number.

It is an amenable number.

111111011009 is a deficient number, since it is larger than the sum of its proper divisors (660161959).

111111011009 is a wasteful number, since it uses less digits than its factorization.

111111011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254515.

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

The spelling of 111111011009 in words is "one hundred eleven billion, one hundred eleven million, eleven thousand, nine".