This Yom Kippur falls on Shabbos.
There is very interesting explanation that I heard from Rabbi Mansour.
Yom Kippur is considered by our sages as Double Shabbos, thus when Yom Kippur falls on Shabbos we actually have triple sanctity on this day (as we know during Shabbos there is “aliyat olamot” – ascent of spiritual worlds and thus all worlds unite in one sephira – ARIAL alludes to this with his statement of “field of sacred apples”).
Numerical value of Shabat = 702
If we look at how many times HAVAYA is included in Shabbat we get to: 702/26 = 27. Thus we have 27 times the power of HAVAYA in one Shabbat.
What happens if we have the triple power of Shabbat as we will have on this Yom Kippur? Then it’s 27 * 3 = 81!
During weekday of Maariv before the prayer we say “Ve-Hu Rachum Yichper Avon ve-lo yashchit ve-hirba lehasiv APo…” And the Merciful One will not destroy and will constrain his anger – in Hebrew Af.
Numerical value of Af is 81. Thus in this Yom Kippur we have the opportunity to erase the power of judgment against us.
May we all be able to achieve this!