22120220221817 has 2 divisors, whose sum is σ = 22120220221818. Its totient is φ = 22120220221816.

The previous prime is 22120220221811. The next prime is 22120220222017. The reversal of 22120220221817 is 71812202202122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17040227136361 + 5079993085456 = 4127981^2 + 2253884^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120220221817 - 2²⁴ = 22120203444601 is a prime.

It is not a weakly prime, because it can be changed into another prime (22120220221811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060110110908 + 11060110110909.

It is an arithmetic number, because the mean of its divisors is an integer number (11060110110909).

Almost surely, 2^{22120220221817} is an apocalyptic number.

It is an amenable number.

22120220221817 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120220221817 is an equidigital number, since it uses as much as digits as its factorization.

22120220221817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

Adding to 22120220221817 its reverse (71812202202122), we get a palindrome (93932422423939).

The spelling of 22120220221817 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty million, two hundred twenty-one thousand, eight hundred seventeen".