1101111009 has 24 divisors (see below), whose sum is σ = 1591421760. Its totient is φ = 676618272.

The previous prime is 1101110963. The next prime is 1101111013. The reversal of 1101111009 is 9001111011.

It is not a de Polignac number, because 1101111009 - 2⁸ = 1101110753 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101101009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26332 + ... + 53810.

It is an arithmetic number, because the mean of its divisors is an integer number (66309240).

Almost surely, 2^1101111009 is an apocalyptic number.

1101111009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1101111009 is a deficient number, since it is larger than the sum of its proper divisors (490310751).

1101111009 is a wasteful number, since it uses less digits than its factorization.

1101111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27557 (or 27538 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 15.

The square root of 1101111009 is about 33182.9927673801. The cubic root of 1101111009 is about 1032.6275356377.

The spelling of 1101111009 in words is "one billion, one hundred one million, one hundred eleven thousand, nine".