212000121220117 has 2 divisors, whose sum is σ = 212000121220118. Its totient is φ = 212000121220116.

The previous prime is 212000121220109. The next prime is 212000121220123. The reversal of 212000121220117 is 711022121000212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207547645632196 + 4452475587921 = 14406514^2 + 2110089^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000121220117 - 2³ = 212000121220109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212000121920117) 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, 106000060610058 + 106000060610059.

It is an arithmetic number, because the mean of its divisors is an integer number (106000060610059).

Almost surely, 2^{212000121220117} is an apocalyptic number.

It is an amenable number.

212000121220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212000121220117 is an equidigital number, since it uses as much as digits as its factorization.

212000121220117 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 212000121220117 its reverse (711022121000212), we get a palindrome (923022242220329).

The spelling of 212000121220117 in words is "two hundred twelve trillion, one hundred twenty-one million, two hundred twenty thousand, one hundred seventeen".