21222030317 has 2 divisors, whose sum is σ = 21222030318. Its totient is φ = 21222030316.

The previous prime is 21222030293. The next prime is 21222030341. The reversal of 21222030317 is 71303022212.

It is a balanced prime because it is at equal distance from previous prime (21222030293) and next prime (21222030341).

It can be written as a sum of positive squares in only one way, i.e., 18403906921 + 2818123396 = 135661^2 + 53086^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222030317 - 2⁸ = 21222030061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222030292 and 21222030301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222030397) 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, 10611015158 + 10611015159.

It is an arithmetic number, because the mean of its divisors is an integer number (10611015159).

Almost surely, 2^21222030317 is an apocalyptic number.

It is an amenable number.

21222030317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222030317 is an equidigital number, since it uses as much as digits as its factorization.

21222030317 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 23.

Adding to 21222030317 its reverse (71303022212), we get a palindrome (92525052529).

The spelling of 21222030317 in words is "twenty-one billion, two hundred twenty-two million, thirty thousand, three hundred seventeen".