Phi(131016,10)/202155625415113
(10^12+1)*(10^212+1)*(10^412+1)*(10^65508+1)/(10^636+1)/(10^1236+1)/(10^21836+1)/2021758409776545113
https://factordb.com/index.php?id=1100000001066040284
http://stdkmd.com/nrr/repunit/prpfactors.htm

To be completed...