I recently read somewhere that black holes with their radius (Event horizon's of course) being equal to the Planck length and their mass equalling Plank's mass, the black holes can be treated as elementary particles.
I mean, the only way we can differentiate between black holes is their spin, charge and mass, which is also how we work with elements.
PS: I am working on a research paper on black holes, if you are interested and experienced in the field, please DM me on Linkedin at: www.linkedin.com/in/kushagra-maheshwari-studentforever . I am only 15, so please do not expect me to be very knowledgable, but I basically used mathematical equations to derive Schwarzschild's radius and kind of what happens inside a black hole. I am very much confused about the subject of black holes; please clarify.