  We have investigated most stable superheavy nuclei by studying the decay
properties such as alpha decay, cluster decay and spontaneous fission. We have
investigated nine stable nuclei in the island of stability which can be
detected through fission are 318123(10.5ms), 319123(4.68{\mu}s),
317124(1.74x104 y), 318124(2.70x101 y), 319124(2.83x10-2 y), 320124(1.91x10-5
y), 319125(2.46x109 y), 320125(3.81x106 y) and 321125(3.99x103 y). Present work
also investigates three stable superheavy nuclei which can be detected through
alpha decay which are 318125(1.03x1012 y), 319126(5.77x1011 y) and
320126(3.99x1010 y). These nuclei will become most stable nuclei if they
synthesized in the laboratory. The identified twelve stable nuclei is the
evidence for the hypothesis of island of stability
