scales, head, fangs, no legs, short tail, long, thin body!

That depends on what scale your country is using (long of short scale)

For the long scale 12.4 trillion would be 12'400'000'000'000'000'000

And for the short scale it would be 12'400'000'000'000

Information about short and long scales can be found on Wikipedia over here:

http://en.wikipedia.org/wiki/Long_and_short_scales

Check the Wikipedia article "Long and short scales". English-speaking countries normally use the "short scale"; most other countries normally use the "long scale".

Angler fish don't have scales at all. So the short answer is no.

Do angler fish have thicker skin? Thicker that what?

Swordfish during early juvenile stage of life (up to 8 inches long), have "scales" that are markedly specialized and rather unique. They are in the form of bony tubercules or expanded compressed platelike bodies. These scales are rough, having spinous projections at the surface and they do not overlap one another as the scales in most fish do. With growth the scales disappear and the adult fish including those sold commercially have no scales