10011020221 has 2 divisors, whose sum is σ = 10011020222. Its totient is φ = 10011020220.

The previous prime is 10011020207. The next prime is 10011020249. The reversal of 10011020221 is 12202011001.

10011020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5024683225 + 4986336996 = 70885^2 + 70614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011020221 - 2⁹ = 10011019709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10011020198 and 10011020207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10011020251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005510110 + 5005510111.

It is an arithmetic number, because the mean of its divisors is an integer number (5005510111).

Almost surely, 2^10011020221 is an apocalyptic number.

It is an amenable number.

10011020221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10011020221 is an equidigital number, since it uses as much as digits as its factorization.

10011020221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10011020221 its reverse (12202011001), we get a palindrome (22213031222).

The spelling of 10011020221 in words is "ten billion, eleven million, twenty thousand, two hundred twenty-one".