It can host large datasets as well, yes. It is hosted by CERN, so it is not specifically IT in any way. It also allows you to restrict access to the files of your submission. It has no requirements to submit your LaTeX sources, any PDF will be fine. There are also no restrictions on who can publish. You'll get a DOI, of course.

Everything published on arXiv could also be published on Zenodo, but not the other way around.