51012305211281 has 2 divisors, whose sum is σ = 51012305211282. Its totient is φ = 51012305211280.

The previous prime is 51012305211277. The next prime is 51012305211347. The reversal of 51012305211281 is 18211250321015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46371210548881 + 4641094662400 = 6809641^2 + 2154320^2 .

It is a cyclic number.

It is not a de Polignac number, because 51012305211281 - 2² = 51012305211277 is a prime.

It is a super-2 number, since 2×51012305211281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51012305216281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25506152605640 + 25506152605641.

It is an arithmetic number, because the mean of its divisors is an integer number (25506152605641).

Almost surely, 2^{51012305211281} is an apocalyptic number.

It is an amenable number.

51012305211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

51012305211281 is an equidigital number, since it uses as much as digits as its factorization.

51012305211281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 32.

Adding to 51012305211281 its reverse (18211250321015), we get a palindrome (69223555532296).

The spelling of 51012305211281 in words is "fifty-one trillion, twelve billion, three hundred five million, two hundred eleven thousand, two hundred eighty-one".