121100212110217 has 2 divisors, whose sum is σ = 121100212110218. Its totient is φ = 121100212110216.

The previous prime is 121100212110203. The next prime is 121100212110223. The reversal of 121100212110217 is 712011212001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110682687701056 + 10417524409161 = 10520584^2 + 3227619^2 .

It is an emirp because it is prime and its reverse (712011212001121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121100212110217 - 2³⁹ = 120550456296329 is a prime.

It is a super-2 number, since 2×121100212110217² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121100212110817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550106055108 + 60550106055109.

It is an arithmetic number, because the mean of its divisors is an integer number (60550106055109).

Almost surely, 2^{121100212110217} is an apocalyptic number.

It is an amenable number.

121100212110217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100212110217 is an equidigital number, since it uses as much as digits as its factorization.

121100212110217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 121100212110217 its reverse (712011212001121), we get a palindrome (833111424111338).

The spelling of 121100212110217 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twelve million, one hundred ten thousand, two hundred seventeen".