22221212017 has 2 divisors, whose sum is σ = 22221212018. Its totient is φ = 22221212016.

The previous prime is 22221211979. The next prime is 22221212033. The reversal of 22221212017 is 71021212222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21406908721 + 814303296 = 146311^2 + 28536^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221212017 - 2¹⁹ = 22220687729 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221212047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110606008 + 11110606009.

It is an arithmetic number, because the mean of its divisors is an integer number (11110606009).

Almost surely, 2^22221212017 is an apocalyptic number.

It is an amenable number.

22221212017 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221212017 is an equidigital number, since it uses as much as digits as its factorization.

22221212017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 22221212017 its reverse (71021212222), we get a palindrome (93242424239).

The spelling of 22221212017 in words is "twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, seventeen".