07000 121 022. Reads as "seven thousand one hundred twenty one twenty two".
07000121022. Reads as "seven billion one hundred twenty one thousand twenty two".
07000 121 022. Reads as "zero, seven thousand, one, two, one zero, two, two".
07000 121 022. This version of the number includes aural CSS to speak the number in individual digits.
Testing was completed using Mac VoiceOver and Safari v2.0.4 on a Mac running OS 10.4.10. If you are using an aural reader different to this (or a different version) and experience something other than what is described, maybe you'll want to document that by including a comment on the descriptive post that accompanies this page.