12321443161 has 2 divisors, whose sum is σ = 12321443162. Its totient is φ = 12321443160.

The previous prime is 12321443143. The next prime is 12321443203. The reversal of 12321443161 is 16134412321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8546078025 + 3775365136 = 92445^2 + 61444^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321443161 - 2¹⁵ = 12321410393 is a prime.

It is not a weakly prime, because it can be changed into another prime (12321243161) 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, 6160721580 + 6160721581.

It is an arithmetic number, because the mean of its divisors is an integer number (6160721581).

Almost surely, 2^12321443161 is an apocalyptic number.

It is an amenable number.

12321443161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321443161 is an equidigital number, since it uses as much as digits as its factorization.

12321443161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

Adding to 12321443161 its reverse (16134412321), we get a palindrome (28455855482).

It can be divided in two parts, 123214 and 43161, that added together give a cube (166375 = 55³).

The spelling of 12321443161 in words is "twelve billion, three hundred twenty-one million, four hundred forty-three thousand, one hundred sixty-one".