So, what is it? 42 of course (you haven’t read Hitchhiker’s Guide yet?! What are you waiting for, go go, and have fun, it is a wonderful read!).
Let’s use a dash of BQN to overexplain why 42 is the meaning of life:
@ + 42
'*'
42 is the ASCII code for ‘*’, which is often used as symbol for anything or, in this case everything.
The @ literal acts as the null character, which in ASCII would be literally 0. If you add the ASCII code you will get the character.
The BQN documentation is, as always, excellent, here it is going on about character arithmetic in plenty of detail.