127221979198 has 8 divisors (see below), whose sum is σ = 200876809320. Its totient is φ = 60263042760.

The previous prime is 127221979169. The next prime is 127221979211. The reversal of 127221979198 is 891979122721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 1673973373 + ... + 1673973448.

It is an arithmetic number, because the mean of its divisors is an integer number (25109601165).

Almost surely, 2^127221979198 is an apocalyptic number.

127221979198 is a deficient number, since it is larger than the sum of its proper divisors (73654830122).

127221979198 is a wasteful number, since it uses less digits than its factorization.

127221979198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347946842.

The product of its digits is 2286144, while the sum is 58.

The spelling of 127221979198 in words is "one hundred twenty-seven billion, two hundred twenty-one million, nine hundred seventy-nine thousand, one hundred ninety-eight".