There are lots of 1 that are repeating, could mean Ascii. Reverse the string

1191215257551151171161051141011161101055354113106106

Split to get valid Ascii range

119 121 52 57 55 115 117 116 105 114 101 116 110 105 53 54 113 106 106

Convert decimal to Ascii

wy497sutiretni56qjj

Reverse

jjq65interitus794yw

That & seems to indicate something, let’s split the string there

30.05.4754.09.42.34.848

09.06.3506.21.09.26.974

Those two string are date and time

DD.MM.YYYY.HH.MM.SS
30.05.4754.09.42.34.848

DD.MM.YYYY.HH.MM.SS
09.06.3506.21.09.26.974

For now remove the extra numbers (848 & 974) at the end of both string. Convert the strings from normal time to Unix timestamp

87867452554

48485250566

Reinsert the extra numbers (848 & 974) at the end of both string.

87867452554848

48485250566974

Join both string and make pairs

87 86 74 52 55 48 48 48 48 52 50 56 69 74

Convert decimal to Ascii

WVJ470000428EJ

We used time to get the code, substitue 0000 for timezero

wvj47timezero428ej

The obvious thing to do is to make groups of 3

Looking at the letter distribution, they are good to spell out numbers. We need to reorder them using the numbers in ascending order

Read the letters

eczninefourseventwofiveeq

We now have the prefix and suffix

ecz94725eq

For the keyword we had to reorder the letters to get the prefix and suffix, keyword is ordered

ecz94ordered725eq