2221311322117 has 2 divisors, whose sum is σ = 2221311322118. Its totient is φ = 2221311322116.

The previous prime is 2221311322103. The next prime is 2221311322157. The reversal of 2221311322117 is 7112231131222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2207500606756 + 13810715361 = 1485766^2 + 117519^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221311322117 - 2³⁹ = 1671555508229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221311322157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110655661058 + 1110655661059.

It is an arithmetic number, because the mean of its divisors is an integer number (1110655661059).

Almost surely, 2^{2221311322117} is an apocalyptic number.

It is an amenable number.

2221311322117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221311322117 is an equidigital number, since it uses as much as digits as its factorization.

2221311322117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

Adding to 2221311322117 its reverse (7112231131222), we get a palindrome (9333542453339).

The spelling of 2221311322117 in words is "two trillion, two hundred twenty-one billion, three hundred eleven million, three hundred twenty-two thousand, one hundred seventeen".