20002211122217 has 2 divisors, whose sum is σ = 20002211122218. Its totient is φ = 20002211122216.

The previous prime is 20002211122211. The next prime is 20002211122247. The reversal of 20002211122217 is 71222111220002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15211645844521 + 4790565277696 = 3900211^2 + 2188736^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002211122217 - 2³⁶ = 19933491645481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002211122192 and 20002211122201.

It is not a weakly prime, because it can be changed into another prime (20002211122211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001105561108 + 10001105561109.

It is an arithmetic number, because the mean of its divisors is an integer number (10001105561109).

Almost surely, 2^{20002211122217} is an apocalyptic number.

It is an amenable number.

20002211122217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002211122217 is an equidigital number, since it uses as much as digits as its factorization.

20002211122217 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 20002211122217 its reverse (71222111220002), we get a palindrome (91224322342219).

The spelling of 20002211122217 in words is "twenty trillion, two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred seventeen".