The voltage level started at 110 V before diversifying into 120 V, 220 Vand 240 V for household usage. The voltages for transmission and distribution that are multiples of 11 are 11 kV, 22 kV, 33 kV, 66 kV, 132 kV, etc. The reason that 110 V service was chosen, was economic. ( per Wikipedia)
I think a lot of what goes on in this day and age has to do with frequency. The frequency a person gives off that has a servant heart is different than someone who is out for number one. If you take all of the world and the frequency that people are putting out what would that equal to? It is probably a balance between the negative and positive. I would hope more positive. A lot of days if you look at comments on YouTube or Facebook it seems very negative. I think that is by design to divide and isolate.
Multiples of eleven are master numbers in Numerology. I think that probably has more to do with why electricity is transmitted in multiples of eleven.
Transfomer Induced voltage equation contains 4.44 factor.
E -Induced emf per phase
T -number of turns
phi -maximum flux per pole
From the equation we see that E is proportional to 4.4 and it is in turn multiple of 11.
So always transmission voltage is multiple of 11
When I look at lists of voltage around the world it seems to vary. United States officially uses 120v and 60hz but a lot of countries seem to use 230 and 50hz so I think it is more of a choice to go with eleven not a fact that is has to be that way.