10021321001 has 2 divisors, whose sum is σ = 10021321002. Its totient is φ = 10021321000.

The previous prime is 10021320949. The next prime is 10021321039. The reversal of 10021321001 is 10012312001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8494387225 + 1526933776 = 92165^2 + 39076^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021321001 - 2¹⁸ = 10021058857 is a prime.

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 (10021321061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010660500 + 5010660501.

It is an arithmetic number, because the mean of its divisors is an integer number (5010660501).

Almost surely, 2^10021321001 is an apocalyptic number.

It is an amenable number.

10021321001 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021321001 is an equidigital number, since it uses as much as digits as its factorization.

10021321001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10021321001 its reverse (10012312001), we get a palindrome (20033633002).

The spelling of 10021321001 in words is "ten billion, twenty-one million, three hundred twenty-one thousand, one".