1101109985 has 4 divisors (see below), whose sum is σ = 1321331988. Its totient is φ = 880887984.

The previous prime is 1101109957. The next prime is 1101109993. The reversal of 1101109985 is 5899011011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208773601 + 892336384 = 14449^2 + 29872^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101109985 - 2¹⁰ = 1101108961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110110994 + ... + 110111003.

It is an arithmetic number, because the mean of its divisors is an integer number (330332997).

Almost surely, 2^1101109985 is an apocalyptic number.

It is an amenable number.

1101109985 is a deficient number, since it is larger than the sum of its proper divisors (220222003).

1101109985 is an equidigital number, since it uses as much as digits as its factorization.

1101109985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220222002.

The product of its (nonzero) digits is 3240, while the sum is 35.

The square root of 1101109985 is about 33182.9773377857. The cubic root of 1101109985 is about 1032.6272155335.

The spelling of 1101109985 in words is "one billion, one hundred one million, one hundred nine thousand, nine hundred eighty-five".