2012021122217 has 2 divisors, whose sum is σ = 2012021122218. Its totient is φ = 2012021122216.

The previous prime is 2012021122171. The next prime is 2012021122247. The reversal of 2012021122217 is 7122211202102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1586733238336 + 425287883881 = 1259656^2 + 652141^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012021122217 - 2¹⁰ = 2012021121193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012021122192 and 2012021122201.

It is not a weakly prime, because it can be changed into another prime (2012021122247) 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, 1006010561108 + 1006010561109.

It is an arithmetic number, because the mean of its divisors is an integer number (1006010561109).

Almost surely, 2^{2012021122217} is an apocalyptic number.

It is an amenable number.

2012021122217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012021122217 is an equidigital number, since it uses as much as digits as its factorization.

2012021122217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 2012021122217 its reverse (7122211202102), we get a palindrome (9134232324319).

The spelling of 2012021122217 in words is "two trillion, twelve billion, twenty-one million, one hundred twenty-two thousand, two hundred seventeen".