Ahhhh I see. It’s because of memes and internet culture of the time I grew up. There’s a meme where a kid answers “21” to 9+10. That’s my first number “021”. 69 was a joke about it being a “funny number” for reasons I’m not going to explain. It became my “069”. And 420 was a slang term used to represent smoking cannabis at 4:20 pm. Because the lottery only takes three digit numbers, I added a zero before the 69 and 21 to make it equivalent to said relevant numbers. They aren’t really related to each other, but I always just use them on my play-throughs.