How Good is this domain?

I registered a domain forgottenness.com
its a dictionary word i guess, tho google doesn't consider it one but all the main sites consider it as one
how good is this? i think i got lucky, but maybe i am not

there is no history on way back machine
How can i know about the backlinks and other things which i should know?

Well, there should be a reason if it didn't register until now.
But honestly, it's not a bad domain, but it's not great either.

Meh

As far as domains are considered, readable short words are better than meaningful huge chunk of words. It'd have been brandable if you chose something like fortnes, forgten etc. The keyword based domains are only good for churn & burn sites, or small/medium sites. Remember that brands like fortnite are meaningless words but are readable.

It's not a word that anyone has ever used in their entire lives, even if it might be found in the dictionary. As well as that, what could be the commercial value of any website that used that domain? Without a serious stretch, there is none.. even an anti-alzheimers blog wouldn't name itself "Forgottenness", and even if it did how popular would that blog be and how much could it generate in revenue? Not much relative to other sites I would imagine.

Keep looking for a gem OP.

Not that good tbh.