Which company's name is a play on "googol", the number 10 to the 100th power?

Which 10-letter word means impervious to sound? Ten members of which secret society of Irish immigrant coal miners were hanged in Pennsylvania on June 21, 1877? In carpentry, 10-penny, 16-penny and 20-penny are sizes of what? Which Olympic event consists of 10 track and field events held over two days? What does 10 to the zero power equal? Ten years after its 1956 Broadway debut, which play became a musical with its title shortened to "Mame"? Which Roman leader, who lived from 100 to 44 BC, is believed to have suffered from epilepsy? Which business magazine publishes the annual "100 Best Companies to Work For" list?