Feminine gender. It is always 'целая' or целых. I don't know why, but I guess the implied word is 'часть', a part. But "одна целая, одна десятая" feels weird and unnatural to say. Either due to the repetition or because the numebr is very simple or both. I'd say just "один миллион сто тысяч". Or the same without the word один. Or at least I would insert И: "одна целая и одна десятая". As to the later two.... you may say "два и....", "десять и...". "XXX целых" is uttered when precision matters.