127198021897 has 8 divisors (see below), whose sum is σ = 129418605440. Its totient is φ = 124992700560.

The previous prime is 127198021883. The next prime is 127198021901. The reversal of 127198021897 is 798120891721.

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

It is a cyclic number.

It is not a de Polignac number, because 127198021897 - 2¹¹ = 127198019849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127198021817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3798738 + ... + 3832075.

It is an arithmetic number, because the mean of its divisors is an integer number (16177325680).

Almost surely, 2^127198021897 is an apocalyptic number.

It is an amenable number.

127198021897 is a deficient number, since it is larger than the sum of its proper divisors (2220583543).

127198021897 is an equidigital number, since it uses as much as digits as its factorization.

127198021897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631103.

The product of its (nonzero) digits is 1016064, while the sum is 55.

The spelling of 127198021897 in words is "one hundred twenty-seven billion, one hundred ninety-eight million, twenty-one thousand, eight hundred ninety-seven".