10212251281 has 2 divisors, whose sum is σ = 10212251282. Its totient is φ = 10212251280.

The previous prime is 10212251263. The next prime is 10212251303. The reversal of 10212251281 is 18215221201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6121497600 + 4090753681 = 78240^2 + 63959^2 .

It is an emirp because it is prime and its reverse (18215221201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10212251281 - 2¹¹ = 10212249233 is a prime.

It is a super-2 number, since 2×10212251281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10212251201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106125640 + 5106125641.

It is an arithmetic number, because the mean of its divisors is an integer number (5106125641).

Almost surely, 2^10212251281 is an apocalyptic number.

It is an amenable number.

10212251281 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212251281 is an equidigital number, since it uses as much as digits as its factorization.

10212251281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 25.

Adding to 10212251281 its reverse (18215221201), we get a palindrome (28427472482).

The spelling of 10212251281 in words is "ten billion, two hundred twelve million, two hundred fifty-one thousand, two hundred eighty-one".