21122022212017 has 2 divisors, whose sum is σ = 21122022212018. Its totient is φ = 21122022212016.

The previous prime is 21122022211987. The next prime is 21122022212101. The reversal of 21122022212017 is 71021222022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16311913517601 + 4810108694416 = 4038801^2 + 2193196^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122022212017 - 2¹⁹ = 21122021687729 is a prime.

It is a super-2 number, since 2×21122022212017² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122022211982 and 21122022212000.

It is not a weakly prime, because it can be changed into another prime (21122022212917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561011106008 + 10561011106009.

It is an arithmetic number, because the mean of its divisors is an integer number (10561011106009).

Almost surely, 2^{21122022212017} is an apocalyptic number.

It is an amenable number.

21122022212017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122022212017 is an equidigital number, since it uses as much as digits as its factorization.

21122022212017 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 21122022212017 its reverse (71021222022112), we get a palindrome (92143244234129).

The spelling of 21122022212017 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-two million, two hundred twelve thousand, seventeen".