3217112221 has 2 divisors, whose sum is σ = 3217112222. Its totient is φ = 3217112220.

The previous prime is 3217112179. The next prime is 3217112231. The reversal of 3217112221 is 1222117123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2511412996 + 705699225 = 50114^2 + 26565^2 .

It is a cyclic number.

It is not a de Polignac number, because 3217112221 - 2¹⁷ = 3216981149 is a prime.

It is a super-2 number, since 2×3217112221² = 20699622085015105682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3217112192 and 3217112201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3217112231) 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, 1608556110 + 1608556111.

It is an arithmetic number, because the mean of its divisors is an integer number (1608556111).

Almost surely, 2^3217112221 is an apocalyptic number.

It is an amenable number.

3217112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3217112221 is an equidigital number, since it uses as much as digits as its factorization.

3217112221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 22.

The square root of 3217112221 is about 56719.5929199073. The cubic root of 3217112221 is about 1476.2346794599.

Adding to 3217112221 its reverse (1222117123), we get a palindrome (4439229344).

The spelling of 3217112221 in words is "three billion, two hundred seventeen million, one hundred twelve thousand, two hundred twenty-one".