Beethoven's Triple-Digit Sonatas

[kevonthegreatpianist]

I tried playing some movements of them, and they're not that difficult. Beethoven's Hammerkalvier, IMO, turns out to be the hardest sonata for all of them; its difficulty is probably equlavient to Chopin's b minor sonata. Do you Beethoven's triple-digits are among Beethoven's hardest and probably impossible sonatas, and which one should I start with (assuming I have the choices of Op.101, Op.106 (Hammerkalvier), Op.109, Op.110, and Op.111?