202112122217 has 2 divisors, whose sum is σ = 202112122218. Its totient is φ = 202112122216.

The previous prime is 202112122189. The next prime is 202112122229. The reversal of 202112122217 is 712221211202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201691708201 + 420414016 = 449101^2 + 20504^2 .

It is a cyclic number.

It is not a de Polignac number, because 202112122217 - 2⁶ = 202112122153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202112122192 and 202112122201.

It is not a weakly prime, because it can be changed into another prime (202112122117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101056061108 + 101056061109.

It is an arithmetic number, because the mean of its divisors is an integer number (101056061109).

Almost surely, 2^202112122217 is an apocalyptic number.

It is an amenable number.

202112122217 is a deficient number, since it is larger than the sum of its proper divisors (1).

202112122217 is an equidigital number, since it uses as much as digits as its factorization.

202112122217 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 23.

Adding to 202112122217 its reverse (712221211202), we get a palindrome (914333333419).

The spelling of 202112122217 in words is "two hundred two billion, one hundred twelve million, one hundred twenty-two thousand, two hundred seventeen".