The mass of a neutron is approx 1837 times that of an electron. The mass of a proton is similar to that of a neutron.
In the simplest atom, hydrogen, the mass of the nucleus is 1,837 times that of an electron.
In the largest known atom, that of ununoctium, containing 281 baryons (neutrons or protons) the mass of the nucleus is approx 516,200 times that of an electron.
So take your pick: 1,837 to 516,200.
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The vast majority of mass in an element is located in the nucleus, comprised of protons and neutrons. Electrons are considered to have almost no mass, although that they exist at all would imply that they must in fact have some mass.
It is about 100,000 times larger
The mass of a nucleus varies according to the atomic number (ie according to what element it is). For hydrogen , the simplest nucleus, the combined mass of the one proton and the one neutron would be equal in mass to 3672 electrons.
There is no simple answer.The mass of a nucleus depends on the number of neutrons and protons in the nucleus. The number of protons in the nucleus depends on the element. Moreover, the number of neutrons can vary between isotopes of the same element.
Electron, proton, nucleus, atom