127217421256 has 16 divisors (see below), whose sum is σ = 242443037340. Its totient is φ = 62565944640.

The previous prime is 127217421229. The next prime is 127217421263. The reversal of 127217421256 is 652124712721.

It can be written as a sum of positive squares in 2 ways, for example, as 127199222500 + 18198756 = 356650^2 + 4266^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130345231 + ... + 130346206.

Almost surely, 2^127217421256 is an apocalyptic number.

It is an amenable number.

127217421256 is a deficient number, since it is larger than the sum of its proper divisors (115225616084).

127217421256 is a wasteful number, since it uses less digits than its factorization.

127217421256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260691504 (or 260691500 counting only the distinct ones).

The product of its digits is 94080, while the sum is 40.

The spelling of 127217421256 in words is "one hundred twenty-seven billion, two hundred seventeen million, four hundred twenty-one thousand, two hundred fifty-six".