Tellurium's Incredible Half-Life

The half-life of an isotope of Tellurium is 160 Trillion times greater than the Universe's Age (Approximately 13.8 billion). The very-long-lived radioisotope Tellurium-128 thus has the longest known half-life among all the Radionuclides of around 2,200,000,000,000,000,000,000,000 years.