125208636852281 has 2 divisors, whose sum is σ = 125208636852282. Its totient is φ = 125208636852280.

The previous prime is 125208636852241. The next prime is 125208636852407. The reversal of 125208636852281 is 182258636802521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118029559667881 + 7179077184400 = 10864141^2 + 2679380^2 .

It is an emirp because it is prime and its reverse (182258636802521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125208636852281 is a prime.

It is a super-2 number, since 2×125208636852281² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125208636852281.

It is not a weakly prime, because it can be changed into another prime (125208636852241) 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, 62604318426140 + 62604318426141.

It is an arithmetic number, because the mean of its divisors is an integer number (62604318426141).

Almost surely, 2^{125208636852281} is an apocalyptic number.

It is an amenable number.

125208636852281 is a deficient number, since it is larger than the sum of its proper divisors (1).

125208636852281 is an equidigital number, since it uses as much as digits as its factorization.

125208636852281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22118400, while the sum is 59.

The spelling of 125208636852281 in words is "one hundred twenty-five trillion, two hundred eight billion, six hundred thirty-six million, eight hundred fifty-two thousand, two hundred eighty-one".