12311122321 has 2 divisors, whose sum is σ = 12311122322. Its totient is φ = 12311122320.

The previous prime is 12311122259. The next prime is 12311122337. The reversal of 12311122321 is 12322111321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12117606400 + 193515921 = 110080^2 + 13911^2 .

It is a cyclic number.

It is not a de Polignac number, because 12311122321 - 2¹⁹ = 12310598033 is a prime.

It is not a weakly prime, because it can be changed into another prime (12311122121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155561160 + 6155561161.

It is an arithmetic number, because the mean of its divisors is an integer number (6155561161).

Almost surely, 2^12311122321 is an apocalyptic number.

It is an amenable number.

12311122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311122321 is an equidigital number, since it uses as much as digits as its factorization.

12311122321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

Adding to 12311122321 its reverse (12322111321), we get a palindrome (24633233642).

The spelling of 12311122321 in words is "twelve billion, three hundred eleven million, one hundred twenty-two thousand, three hundred twenty-one".