Why not agus instead of is a?
'Is' (not being the copula and anything else) is an alternative to 'agus'
look at number 3 in the above link
Should this be pronounced mil YOON?
The stress on the 2nd syllable is correct for Munster Irish, but her pronunciation is still dire (the 'll' and strange pronunciation of the long vowel).
Here ye go: http://www.teanglann.ie/en/fuaim/milli%C3%BAn
To say "one million one thousand and one", would you say "Milliún is míle is a haon"?
1000001 marked wrong
I tried it too.