Ununbium Ionization Energy

The Ununbium Ionization Energy is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Ununbium.
Uub -> Uub⁺ + e^-
This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Ununbium is:
Uub^N+ -> Uub^(N+1)+ + e^-

There is no data about Ununbium ionization energy