127660021273 has 2 divisors, whose sum is σ = 127660021274. Its totient is φ = 127660021272.

The previous prime is 127660021267. The next prime is 127660021327. The reversal of 127660021273 is 372120066721.

It is a happy number.

Together with next prime (127660021327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101523802384 + 26136218889 = 318628^2 + 161667^2 .

It is a cyclic number.

It is not a de Polignac number, because 127660021273 - 2¹⁷ = 127659890201 is a prime.

It is not a weakly prime, because it can be changed into another prime (127660021243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63830010636 + 63830010637.

It is an arithmetic number, because the mean of its divisors is an integer number (63830010637).

Almost surely, 2^127660021273 is an apocalyptic number.

It is an amenable number.

127660021273 is a deficient number, since it is larger than the sum of its proper divisors (1).

127660021273 is an equidigital number, since it uses as much as digits as its factorization.

127660021273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

Adding to 127660021273 its reverse (372120066721), we get a palindrome (499780087994).

The spelling of 127660021273 in words is "one hundred twenty-seven billion, six hundred sixty million, twenty-one thousand, two hundred seventy-three".