Guess the next number in this series - 13113, 83049, 8037, 99123, ?

Question

Guess the next number in the series: 123, 111213, 31121113, **********, ?

Answer 1

15651 (not easy to explain)
If this answer is the wanted one, the logic behind the question is questonable..

Comments

First of all thank you for trying this problem out ! :D. This series I made so that it would be mind boggingly difficult.
In fact the answer to this series ends in a non integer number.
The answer is 4188.2958 (8 is were I rounded it off) This also where I can't continue the series because the series needs the last 2 digits of the previous terms along with the sum of all its digits
For ex from 13113 I take 1+3+1+1+3 = 9
13 (last 2 digit of 13113) + 9 = 22
Then 22 - 3 = 19
Then
13113 × (19/3) = 83049

8+3+0+4+9 = 24
49 - 24(sign changes alternatively) = 25 +(here as well) (3×2) = 31
83048 × (3/31) = 8037

8+0+3+7 = 18
37 + 18 = 55
= 55 - (3×2×3) = 37
8037 × (37/3) = 99123

9+9+1+2+3 = 24
23 - 24 = -1
-1 + (3*2*3*4) = 71
= 99123 × (3/71) = 4188.2958