10442767721 has 2 divisors, whose sum is σ = 10442767722. Its totient is φ = 10442767720.

The previous prime is 10442767711. The next prime is 10442767739. The reversal of 10442767721 is 12776724401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10241440000 + 201327721 = 101200^2 + 14189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10442767721 is a prime.

It is not a weakly prime, because it can be changed into another prime (10442767711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5221383860 + 5221383861.

It is an arithmetic number, because the mean of its divisors is an integer number (5221383861).

Almost surely, 2^10442767721 is an apocalyptic number.

It is an amenable number.

10442767721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10442767721 is an equidigital number, since it uses as much as digits as its factorization.

10442767721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 10442767721 in words is "ten billion, four hundred forty-two million, seven hundred sixty-seven thousand, seven hundred twenty-one".