127144770670721 has 2 divisors, whose sum is σ = 127144770670722. Its totient is φ = 127144770670720.

The previous prime is 127144770670703. The next prime is 127144770670769. The reversal of 127144770670721 is 127076077441721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70330698595600 + 56814072075121 = 8386340^2 + 7537511^2 .

It is a cyclic number.

It is not a de Polignac number, because 127144770670721 - 2¹⁴ = 127144770654337 is a prime.

It is not a weakly prime, because it can be changed into another prime (127144770678721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63572385335360 + 63572385335361.

It is an arithmetic number, because the mean of its divisors is an integer number (63572385335361).

Almost surely, 2^{127144770670721} is an apocalyptic number.

It is an amenable number.

127144770670721 is a deficient number, since it is larger than the sum of its proper divisors (1).

127144770670721 is an equidigital number, since it uses as much as digits as its factorization.

127144770670721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6453888, while the sum is 56.

The spelling of 127144770670721 in words is "one hundred twenty-seven trillion, one hundred forty-four billion, seven hundred seventy million, six hundred seventy thousand, seven hundred twenty-one".