What is the next number and why? - 11,21,1112,… [duplicate]

Simple logic question, what is the next number and why?

11, 21, 1112, 3112, 211213, 312213, 212223, 114213, ?

• This is something like the 5th version of this sequence (allowing for variations for order of digits) in the last few days... did this sort of puzzle get published somewhere recently? – Glen O May 8 '15 at 1:26
• Go here at $5$:$33$, youtube.com/watch?v=r5P-f5arPXE – Mr Pie May 4 '18 at 7:08