127195121 has 2 divisors, whose sum is σ = 127195122. Its totient is φ = 127195120.

The previous prime is 127195021. The next prime is 127195141. The reversal of 127195121 is 121591721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 6195121 = 11000^2 + 2489^2 .

It is an emirp because it is prime and its reverse (121591721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127195121 - 2²² = 123000817 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (127195141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63597560 + 63597561.

It is an arithmetic number, because the mean of its divisors is an integer number (63597561).

Almost surely, 2^127195121 is an apocalyptic number.

It is an amenable number.

127195121 is a deficient number, since it is larger than the sum of its proper divisors (1).

127195121 is an equidigital number, since it uses as much as digits as its factorization.

127195121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 29.

The square root of 127195121 is about 11278.0814414509. The cubic root of 127195121 is about 502.9098605714.

The spelling of 127195121 in words is "one hundred twenty-seven million, one hundred ninety-five thousand, one hundred twenty-one".