1121109809 has 8 divisors (see below), whose sum is σ = 1137613248. Its totient is φ = 1104626320.

The previous prime is 1121109793. The next prime is 1121109833. The reversal of 1121109809 is 9089011211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121109809 - 2⁴ = 1121109793 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 (1121199809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137834 + ... + 145740.

It is an arithmetic number, because the mean of its divisors is an integer number (142201656).

Almost surely, 2^1121109809 is an apocalyptic number.

It is an amenable number.

1121109809 is a deficient number, since it is larger than the sum of its proper divisors (16503439).

1121109809 is an equidigital number, since it uses as much as digits as its factorization.

1121109809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9975.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 1121109809 is about 33482.9778992252. The cubic root of 1121109809 is about 1038.8417236036.

The spelling of 1121109809 in words is "one billion, one hundred twenty-one million, one hundred nine thousand, eight hundred nine".