Contrary to prior advice, I'd invest 100% in stocks (VTSAX).
You are young, and are going to be adding a substantial amount of money in addition to this first windfall. (In fact, you're adding so much additional money that the windfall is almost not important after a couple years... ;) )
There is no single right answer and genuine debate on the topic of asset allocation. I'd be sure to stay away from buying annuities in all cases, and would tend to buy all equities, but if you wanted more stability, adding bonds is a good path (at the expense of absolute return in general).
As for domestic vs international, my view is that US citizens who expect to retire in the US should probably be OK with "only" US equities. US companies inherently have a lot of exposure to international growth already (Apple, Coke, Amazon, etc).