6717220220221 has 16 divisors (see below), whose sum is σ = 7684908981120. Its totient is φ = 5751554054400.

The previous prime is 6717220220171. The next prime is 6717220220231. The reversal of 6717220220221 is 1220220227176.

It is not a de Polignac number, because 6717220220221 - 2¹⁷ = 6717220089149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6717220220231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82188345 + ... + 82270033.

It is an arithmetic number, because the mean of its divisors is an integer number (480306811320).

Almost surely, 2^{6717220220221} is an apocalyptic number.

It is an amenable number.

6717220220221 is a deficient number, since it is larger than the sum of its proper divisors (967688760899).

6717220220221 is a wasteful number, since it uses less digits than its factorization.

6717220220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93924.

The product of its (nonzero) digits is 18816, while the sum is 34.

Adding to 6717220220221 its reverse (1220220227176), we get a palindrome (7937440447397).

The spelling of 6717220220221 in words is "six trillion, seven hundred seventeen billion, two hundred twenty million, two hundred twenty thousand, two hundred twenty-one".