5120210256281 has 2 divisors, whose sum is σ = 5120210256282. Its totient is φ = 5120210256280.

The previous prime is 5120210256277. The next prime is 5120210256341. The reversal of 5120210256281 is 1826520120215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2757177225625 + 2363033030656 = 1660475^2 + 1537216^2 .

It is a cyclic number.

It is not a de Polignac number, because 5120210256281 - 2² = 5120210256277 is a prime.

It is a super-2 number, since 2×5120210256281² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5120210256481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560105128140 + 2560105128141.

It is an arithmetic number, because the mean of its divisors is an integer number (2560105128141).

Almost surely, 2^{5120210256281} is an apocalyptic number.

It is an amenable number.

5120210256281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5120210256281 is an equidigital number, since it uses as much as digits as its factorization.

5120210256281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

Adding to 5120210256281 its reverse (1826520120215), we get a palindrome (6946730376496).

The spelling of 5120210256281 in words is "five trillion, one hundred twenty billion, two hundred ten million, two hundred fifty-six thousand, two hundred eighty-one".