12731927756281 has 2 divisors, whose sum is σ = 12731927756282. Its totient is φ = 12731927756280.

The previous prime is 12731927756147. The next prime is 12731927756299. The reversal of 12731927756281 is 18265772913721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10997480900025 + 1734446856256 = 3316245^2 + 1316984^2 .

It is a cyclic number.

It is not a de Polignac number, because 12731927756281 - 2¹⁵ = 12731927723513 is a prime.

It is a super-2 number, since 2×12731927756281² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12731927751281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6365963878140 + 6365963878141.

It is an arithmetic number, because the mean of its divisors is an integer number (6365963878141).

Almost surely, 2^{12731927756281} is an apocalyptic number.

It is an amenable number.

12731927756281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12731927756281 is an equidigital number, since it uses as much as digits as its factorization.

12731927756281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 61.

The spelling of 12731927756281 in words is "twelve trillion, seven hundred thirty-one billion, nine hundred twenty-seven million, seven hundred fifty-six thousand, two hundred eighty-one".