212011220122217 has 2 divisors, whose sum is σ = 212011220122218. Its totient is φ = 212011220122216.

The previous prime is 212011220122199. The next prime is 212011220122283. The reversal of 212011220122217 is 712221022110212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190389798908761 + 21621421213456 = 13798181^2 + 4649884^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011220122217 - 2³⁴ = 211994040253033 is a prime.

It is a super-2 number, since 2×212011220122217² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212011220128217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005610061108 + 106005610061109.

It is an arithmetic number, because the mean of its divisors is an integer number (106005610061109).

Almost surely, 2^{212011220122217} is an apocalyptic number.

It is an amenable number.

212011220122217 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011220122217 is an equidigital number, since it uses as much as digits as its factorization.

212011220122217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 212011220122217 its reverse (712221022110212), we get a palindrome (924232242232429).

The spelling of 212011220122217 in words is "two hundred twelve trillion, eleven billion, two hundred twenty million, one hundred twenty-two thousand, two hundred seventeen".