10021212112217 has 2 divisors, whose sum is σ = 10021212112218. Its totient is φ = 10021212112216.

The previous prime is 10021212112207. The next prime is 10021212112271. The reversal of 10021212112217 is 71221121212001.

Together with next prime (10021212112271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9186015352336 + 835196759881 = 3030844^2 + 913891^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021212112217 - 2²⁴ = 10021195335001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021212112192 and 10021212112201.

It is not a weakly prime, because it can be changed into another prime (10021212112207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010606056108 + 5010606056109.

It is an arithmetic number, because the mean of its divisors is an integer number (5010606056109).

Almost surely, 2^{10021212112217} is an apocalyptic number.

It is an amenable number.

10021212112217 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021212112217 is an equidigital number, since it uses as much as digits as its factorization.

10021212112217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 10021212112217 its reverse (71221121212001), we get a palindrome (81242333324218).

The spelling of 10021212112217 in words is "ten trillion, twenty-one billion, two hundred twelve million, one hundred twelve thousand, two hundred seventeen".