121002220217 has 2 divisors, whose sum is σ = 121002220218. Its totient is φ = 121002220216.

The previous prime is 121002220189. The next prime is 121002220247. The reversal of 121002220217 is 712022200121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82678676521 + 38323543696 = 287539^2 + 195764^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002220217 - 2¹⁸ = 121001958073 is a prime.

It is not a weakly prime, because it can be changed into another prime (121002220247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501110108 + 60501110109.

It is an arithmetic number, because the mean of its divisors is an integer number (60501110109).

Almost surely, 2^121002220217 is an apocalyptic number.

It is an amenable number.

121002220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002220217 is an equidigital number, since it uses as much as digits as its factorization.

121002220217 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 20.

Adding to 121002220217 its reverse (712022200121), we get a palindrome (833024420338).

The spelling of 121002220217 in words is "one hundred twenty-one billion, two million, two hundred twenty thousand, two hundred seventeen".