10021010212121 has 2 divisors, whose sum is σ = 10021010212122. Its totient is φ = 10021010212120.

The previous prime is 10021010212093. The next prime is 10021010212183. The reversal of 10021010212121 is 12121201012001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5580461290000 + 4440548922121 = 2362300^2 + 2107261^2 .

It is an emirp because it is prime and its reverse (12121201012001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10021010212121 - 2²² = 10021006017817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021010212096 and 10021010212105.

It is not a weakly prime, because it can be changed into another prime (10021010212721) 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, 5010505106060 + 5010505106061.

It is an arithmetic number, because the mean of its divisors is an integer number (5010505106061).

Almost surely, 2^{10021010212121} is an apocalyptic number.

It is an amenable number.

10021010212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021010212121 is an equidigital number, since it uses as much as digits as its factorization.

10021010212121 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 14.

Adding to 10021010212121 its reverse (12121201012001), we get a palindrome (22142211224122).

The spelling of 10021010212121 in words is "ten trillion, twenty-one billion, ten million, two hundred twelve thousand, one hundred twenty-one".