Who called from 2021001000

Got 2 calls from this number today. I answered the second one and it was ringing, like I had dialed the number. Someone picked up, a male, but I automatically hung up. Lame.

Received a call man claims to be with the US Treasury Dept calling to give me $9000 grant.  Hung up as soon as I put him on speaker phone.

I have gotten soooo many calls from this number in the last few weeks today I decided to answer and got a ringing in my ear until a man with Indian accent answered from the U.S. dept of government.upon telling him several times I couldn't understand what dept he was calling from ( even though I did ) a lady then got on the phone same accent wanting to give me 9,000$ BUT she said she was with dept of HEALTH! I then yelled SCAM in her ear and hung up

I was also offered $8000 that I "do not have to pay back!"

Hope they get shut down soon.

Soes anyone know how to block this number?  TWC says they cannot block because it is an invalid number.