12822311581 has 2 divisors, whose sum is σ = 12822311582. Its totient is φ = 12822311580.

The previous prime is 12822311573. The next prime is 12822311609. The reversal of 12822311581 is 18511322821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11144180356 + 1678131225 = 105566^2 + 40965^2 .

It is an emirp because it is prime and its reverse (18511322821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12822311581 - 2³ = 12822311573 is a prime.

It is a super-2 number, since 2×12822311581² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12822311531) 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, 6411155790 + 6411155791.

It is an arithmetic number, because the mean of its divisors is an integer number (6411155791).

Almost surely, 2^12822311581 is an apocalyptic number.

It is an amenable number.

12822311581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12822311581 is an equidigital number, since it uses as much as digits as its factorization.

12822311581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 34.

The spelling of 12822311581 in words is "twelve billion, eight hundred twenty-two million, three hundred eleven thousand, five hundred eighty-one".