This sounds a bit confused. The deficit and the debt are two different things. The deficit is the shortfall in a given year's budget (how much spending exceeds revenue.) This year's deficit is projected at a shade short of $500 billion. If I'm not mistaken, that doesn't include the Iraq supplements, so really it's higher.
I don't really see - though I'm no expert - how you could describe a given year's deficit as being owed to anyone in particular. I mean, I guess you could talk about who bought new bond issues, but it doesn't much matter whether the bonds the chinese hold are new ones or old ones, after all. And at any rate, over 21 months you'd already be talking about multiple deficits.
The debt is the accumulation of all the annual deficits (less the rare moments we pay a bit of it down.) The debt stands at about 7.1 trillion dollars, of which about three trillion is "intragovernmental" - largely the money borrowed from the social security and medicare trust funds - and normally counted separately; that leaves a public debt of $4.1 trillion, give or take a few billion.
Most of that debt is owned domestically, I think, but among foreign owners Japan, Britain and China do lead. As a security issue, foreign ownership of US debt probably isn't a huge deal right now, but it wouldn't take very many years at $500bn a year before it would be.
See the finance tables at
http://www.gpoaccess.gov/eop/tables04.html for references.