Do they have a trademark on the word apple with no other context? I thought it was Apple computer, which is distinct.

Apple is also a record label (that existed before the computer company), specifically one owned by the Beatles.

There were even some legal battles between them, see https://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer

Apparently it ended with Apple Computers buying the trademark from Apple (record company) and then licencing it back (weird but ok).