12318243881 has 2 divisors, whose sum is σ = 12318243882. Its totient is φ = 12318243880.

The previous prime is 12318243857. The next prime is 12318243901. The reversal of 12318243881 is 18834281321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11337990400 + 980253481 = 106480^2 + 31309^2 .

It is a cyclic number.

It is not a de Polignac number, because 12318243881 - 2²² = 12314049577 is a prime.

It is a super-2 number, since 2×12318243881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12318243851) 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, 6159121940 + 6159121941.

It is an arithmetic number, because the mean of its divisors is an integer number (6159121941).

Almost surely, 2^12318243881 is an apocalyptic number.

It is an amenable number.

12318243881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12318243881 is an equidigital number, since it uses as much as digits as its factorization.

12318243881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 41.

The spelling of 12318243881 in words is "twelve billion, three hundred eighteen million, two hundred forty-three thousand, eight hundred eighty-one".