221311223017 has 2 divisors, whose sum is σ = 221311223018. Its totient is φ = 221311223016.

The previous prime is 221311223011. The next prime is 221311223099. The reversal of 221311223017 is 710322113122.

221311223017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219079227481 + 2231995536 = 468059^2 + 47244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221311223017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221311222982 and 221311223000.

It is not a weakly prime, because it can be changed into another prime (221311223011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655611508 + 110655611509.

It is an arithmetic number, because the mean of its divisors is an integer number (110655611509).

Almost surely, 2^221311223017 is an apocalyptic number.

It is an amenable number.

221311223017 is a deficient number, since it is larger than the sum of its proper divisors (1).

221311223017 is an equidigital number, since it uses as much as digits as its factorization.

221311223017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 221311223017 its reverse (710322113122), we get a palindrome (931633336139).

The spelling of 221311223017 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, seventeen".