121020212220217 has 2 divisors, whose sum is σ = 121020212220218. Its totient is φ = 121020212220216.

The previous prime is 121020212220209. The next prime is 121020212220227. The reversal of 121020212220217 is 712022212020121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117860791289641 + 3159420930576 = 10856371^2 + 1777476^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020212220217 - 2³ = 121020212220209 is a prime.

It is a super-3 number, since 3×121020212220217³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121020212220191 and 121020212220200.

It is not a weakly prime, because it can be changed into another prime (121020212220227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510106110108 + 60510106110109.

It is an arithmetic number, because the mean of its divisors is an integer number (60510106110109).

Almost surely, 2^{121020212220217} is an apocalyptic number.

It is an amenable number.

121020212220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020212220217 is an equidigital number, since it uses as much as digits as its factorization.

121020212220217 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 25.

Adding to 121020212220217 its reverse (712022212020121), we get a palindrome (833042424240338).

The spelling of 121020212220217 in words is "one hundred twenty-one trillion, twenty billion, two hundred twelve million, two hundred twenty thousand, two hundred seventeen".