Swirlyman

Hi,

I'm trying to work out how to say Italian ordinals above 1000.
1001st - is it "millesimo primo" or "milleunesimo" ?
2002nd - is it "duemillesimo secondo" or "duemiladuesimo" ?
5009th - is it "cinquemillesimo quinto" or "cinquemilanovesimo" ?

The same questions apply up to x009, after which I suppose the pattern is simply ...millesimo<smaller ordinal>
eg. 1010th - "millesimodecimo"
1011th - "millesimoundicesimo"
3024th - "tremillesimoventiquattresimo"

Thanks,
Swirlyman