The FDIC has published a brochure explaining the amount of FDIC insurance for various situations including revocable trusts, irrevocable trusts, and entities such as corporations and LLCs.  

Revocable trusts can easily qualify for $1,250,000 of coverage, and may qualify for even higher coverage in very narrow circumstances. Irrevocable trusts generally are limited to $250,000 of coverage. Likewise, entities are limited to $250,000 of coverage. The good news is that it is easy to expand the amount of coverage well beyond $250,000 by setting up accounts in the names of trusts and entities.