21422331317 has 2 divisors, whose sum is σ = 21422331318. Its totient is φ = 21422331316.

The previous prime is 21422331283. The next prime is 21422331361. The reversal of 21422331317 is 71313322412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20590528036 + 831803281 = 143494^2 + 28841^2 .

It is a cyclic number.

It is not a de Polignac number, because 21422331317 - 2¹⁸ = 21422069173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21422331317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21422031317) 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, 10711165658 + 10711165659.

It is an arithmetic number, because the mean of its divisors is an integer number (10711165659).

Almost surely, 2^21422331317 is an apocalyptic number.

It is an amenable number.

21422331317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422331317 is an equidigital number, since it uses as much as digits as its factorization.

21422331317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 29.

Adding to 21422331317 its reverse (71313322412), we get a palindrome (92735653729).

The spelling of 21422331317 in words is "twenty-one billion, four hundred twenty-two million, three hundred thirty-one thousand, three hundred seventeen".