1100111009 has 4 divisors (see below), whose sum is σ = 1100326704. Its totient is φ = 1099895316.

The previous prime is 1100111003. The next prime is 1100111029. The reversal of 1100111009 is 9001110011.

It is a happy number.

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: 9001110011 = 24623 ⋅365557.

It is a cyclic number.

It is not a de Polignac number, because 1100111009 - 2⁴ = 1100110993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100110984 and 1100111002.

It is not an unprimeable number, because it can be changed into a prime (1100111003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100007 + ... + 110460.

It is an arithmetic number, because the mean of its divisors is an integer number (275081676).

Almost surely, 2^1100111009 is an apocalyptic number.

It is an amenable number.

1100111009 is a deficient number, since it is larger than the sum of its proper divisors (215695).

1100111009 is an equidigital number, since it uses as much as digits as its factorization.

1100111009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215694.

The product of its (nonzero) digits is 9, while the sum is 14.

The square root of 1100111009 is about 33167.9213849768. The cubic root of 1100111009 is about 1032.3148392530.

The spelling of 1100111009 in words is "one billion, one hundred million, one hundred eleven thousand, nine".