2012121021217 has 2 divisors, whose sum is σ = 2012121021218. Its totient is φ = 2012121021216.

The previous prime is 2012121021193. The next prime is 2012121021223. The reversal of 2012121021217 is 7121201212102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1556328605841 + 455792415376 = 1247529^2 + 675124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2012121021217 is a prime.

It is a super-2 number, since 2×2012121021217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2012124021217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006060510608 + 1006060510609.

It is an arithmetic number, because the mean of its divisors is an integer number (1006060510609).

Almost surely, 2^{2012121021217} is an apocalyptic number.

It is an amenable number.

2012121021217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012121021217 is an equidigital number, since it uses as much as digits as its factorization.

2012121021217 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 22.

Adding to 2012121021217 its reverse (7121201212102), we get a palindrome (9133322233319).

The spelling of 2012121021217 in words is "two trillion, twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred seventeen".