10021011281 has 2 divisors, whose sum is σ = 10021011282. Its totient is φ = 10021011280.

The previous prime is 10021011227. The next prime is 10021011317. The reversal of 10021011281 is 18211012001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10021011025 + 256 = 100105^2 + 16^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021011281 is a prime.

It is a super-2 number, since 2×10021011281² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10021011181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010505640 + 5010505641.

It is an arithmetic number, because the mean of its divisors is an integer number (5010505641).

Almost surely, 2^10021011281 is an apocalyptic number.

It is an amenable number.

10021011281 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021011281 is an equidigital number, since it uses as much as digits as its factorization.

10021011281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10021011281 its reverse (18211012001), we get a palindrome (28232023282).

The spelling of 10021011281 in words is "ten billion, twenty-one million, eleven thousand, two hundred eighty-one".