12244938781 has 2 divisors, whose sum is σ = 12244938782. Its totient is φ = 12244938780.

The previous prime is 12244938707. The next prime is 12244938799. The reversal of 12244938781 is 18783944221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10834936281 + 1410002500 = 104091^2 + 37550^2 .

It is a cyclic number.

It is not a de Polignac number, because 12244938781 - 2¹¹ = 12244936733 is a prime.

It is a super-2 number, since 2×12244938781² (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 (12244938701) 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, 6122469390 + 6122469391.

It is an arithmetic number, because the mean of its divisors is an integer number (6122469391).

Almost surely, 2^12244938781 is an apocalyptic number.

It is an amenable number.

12244938781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12244938781 is an equidigital number, since it uses as much as digits as its factorization.

12244938781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The spelling of 12244938781 in words is "twelve billion, two hundred forty-four million, nine hundred thirty-eight thousand, seven hundred eighty-one".