10001222110021 has 2 divisors, whose sum is σ = 10001222110022. Its totient is φ = 10001222110020.

The previous prime is 10001222110013. The next prime is 10001222110051. The reversal of 10001222110021 is 12001122210001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8768764664100 + 1232457445921 = 2961210^2 + 1110161^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001222110021 - 2³ = 10001222110013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10001222109983 and 10001222110010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10001222110051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000611055010 + 5000611055011.

It is an arithmetic number, because the mean of its divisors is an integer number (5000611055011).

Almost surely, 2^{10001222110021} is an apocalyptic number.

It is an amenable number.

10001222110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001222110021 is an equidigital number, since it uses as much as digits as its factorization.

10001222110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10001222110021 its reverse (12001122210001), we get a palindrome (22002344320022).

The spelling of 10001222110021 in words is "ten trillion, one billion, two hundred twenty-two million, one hundred ten thousand, twenty-one".