1. 123 – one hundred twenty-three 2. 22,222 – twenty-two thousand two hundred twenty-two 3. 222,222 – two hundred twenty-two thousand two hundred twenty-two 4. 2,222,222 – two million two hundred twenty-two thousand two hundred twenty-two 5. 22,222,222 – twenty-two million two hundred twenty-two thousand two hundred twenty-two 6. 222,222,222 – two hundred twenty-two million two hundred twenty-two thousand two hundred twenty-two

Randy's answer is correct. Just extra information for fun; US speakers have an interesting way to say numbers in the "thousands" (4 digit numbers). E.g. "2000" - UK and US will say "two thousand". "2222" - UK and US say "two thousand two hundred and twenty-two". But "2200" - UK will say "two thousand two hundred", but often US will say "twenty-two hundred"! So don't be confused or surprised when you hear it!

These are "numbers." Your question is "How do you say these numbers?" A "digit" is any one of the single characters 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. "22,222" is a five-digit number.