How much weighs one cubic centimeter of a neutron star?

The density of a neutron star could be as high as 10^15 grams per cubic centimeter (1,000,000,000,000,000 gm/cc). A teaspoonful of this material would weigh ten billion tons on the surface of the earth. A specimen the size of the period at the end of this sentence would weigh as much as the ill-fated ocean liner the Titanic.