Hello Govindan,
Yes it is possible to have multiple production environments, in general, it is possible to have multiple environments just file a ticket to mendix to discuss the options also with respect to naming.
And like Erwin already mentioned if you have multiple projects you can upload the mda file.
Hope this helps,
Good luck!
You should be able to deploy your application on multiple nodes. If the node is not part of the same project you will need to upload the .mda file manually.