No, its "veintiuno". But I don't think that was what the question meant. If you mean the names of the countries, they are:
España, Cuba, La República Dominicana, México, Guatemala, El Salvador, Honduras, Costa Rica, Panamá, Colombia, Venezuela, Ecuador, El Perú, Bolivia, Chile, Paraguay, Uruguay, La Argentina, what am I missing here? These are the countries with Spanish as a dominant language, but Spanish is also spoken in a number of other countries (US, Brazil, Belize, to name a few...)
You spell the number 12 in spanish "doce." You should always spell this number in word form if you plan to use it at the beginning of a sentence, such as "Doce minutos?"
doce ['do.se] espLatam.; ['do.θe] Esp.
12 = doce
It is "Doscientos"
Cuarenta
Ciento dos
The number eleven is spelled 'once' (awn-say) in Spanish.
The number 5200 is cinco mil doscientos.
Cuarenta y cuatro
Treinta y cinco
noventa y nueve
sesenta y tres