121201210212217 has 2 divisors, whose sum is σ = 121201210212218. Its totient is φ = 121201210212216.

The previous prime is 121201210212193. The next prime is 121201210212233. The reversal of 121201210212217 is 712212012102121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120953122541161 + 248087671056 = 10997869^2 + 498084^2 .

It is an emirp because it is prime and its reverse (712212012102121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121201210212217 - 2¹¹ = 121201210210169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121201210212191 and 121201210212200.

It is not a weakly prime, because it can be changed into another prime (121201210212617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600605106108 + 60600605106109.

It is an arithmetic number, because the mean of its divisors is an integer number (60600605106109).

Almost surely, 2^{121201210212217} is an apocalyptic number.

It is an amenable number.

121201210212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201210212217 is an equidigital number, since it uses as much as digits as its factorization.

121201210212217 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 25.

Adding to 121201210212217 its reverse (712212012102121), we get a palindrome (833413222314338).

The spelling of 121201210212217 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred ten million, two hundred twelve thousand, two hundred seventeen".