What three key features allow prokaryotic populations to consist of trillions of individuals?

I think the features are that, prokaryotes are small, they produce by binary fusion and that they have short generation times. Prokaryotes are unicellular organism that lack membrane bound nucleus, mitochondria or any other membrane bound organelles. Prokaryotes reproduce asexually through binary fission which is a kind of reproduction that occurs in bacteria and other single celled eukaryotes such as Amoeba. The body separates into two new bodies and  where the body/organism duplicates its genetic materials or DNA and then divides into two parts, with each new organism receiving one copy of DNA.