10021010221 has 2 divisors, whose sum is σ = 10021010222. Its totient is φ = 10021010220.

The previous prime is 10021010171. The next prime is 10021010227. The reversal of 10021010221 is 12201012001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6178746025 + 3842264196 = 78605^2 + 61986^2 .

It is an emirp because it is prime and its reverse (12201012001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10021010221 - 2⁹ = 10021009709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021010198 and 10021010207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021010227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010505110 + 5010505111.

It is an arithmetic number, because the mean of its divisors is an integer number (5010505111).

Almost surely, 2^10021010221 is an apocalyptic number.

It is an amenable number.

10021010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021010221 is an equidigital number, since it uses as much as digits as its factorization.

10021010221 is an evil number, because the sum of its binary digits is even.

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

Adding to 10021010221 its reverse (12201012001), we get a palindrome (22222022222).

The spelling of 10021010221 in words is "ten billion, twenty-one million, ten thousand, two hundred twenty-one".