As suggested in a cousin: onety-one thousand, seven hundred and eighty thirteen.

Every word (phrase in the case of hundred/thousand) becomes strictly one digit, as opposed to normal English where e.g. "thirteen" is actually two digits.

But onety-one thousand isn’t strictly one digit, is it?

Sixteen-one thousand, seven hundred and eighty fourteen

As, from the original french comment:

1A = dix / ten

10 = seize / sixteen

11 = seize-et-un / sixteen-one

Others have suggested 10 = onety instead of sixteen. This would be more consistent, but less idiomatic (onety is not a number in English, and hex is base sixteen).

From the grandparent:

11 78D seize-un mille sept cent octante-quatrorze.

Or, in English:

11,78D Sixteen-one thousand seven hundred eighty fourteen.