21010773000281 has 2 divisors, whose sum is σ = 21010773000282. Its totient is φ = 21010773000280.

The previous prime is 21010773000251. The next prime is 21010773000331. The reversal of 21010773000281 is 18200037701012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17559946630681 + 3450826369600 = 4190459^2 + 1857640^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010773000281 - 2²² = 21010768805977 is a prime.

It is a super-2 number, since 2×21010773000281² (a number of 27 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 (21010773000251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505386500140 + 10505386500141.

It is an arithmetic number, because the mean of its divisors is an integer number (10505386500141).

Almost surely, 2^{21010773000281} is an apocalyptic number.

It is an amenable number.

21010773000281 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010773000281 is an equidigital number, since it uses as much as digits as its factorization.

21010773000281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 32.

The spelling of 21010773000281 in words is "twenty-one trillion, ten billion, seven hundred seventy-three million, two hundred eighty-one", and thus it is an aban number.