12331314421 has 2 divisors, whose sum is σ = 12331314422. Its totient is φ = 12331314420.

The previous prime is 12331314419. The next prime is 12331314439. The reversal of 12331314421 is 12441313321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8471177521 + 3860136900 = 92039^2 + 62130^2 .

It is an emirp because it is prime and its reverse (12441313321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12331314421 - 2¹ = 12331314419 is a prime.

It is a super-2 number, since 2×12331314421² (a number of 21 digits) contains 22 as substring.

Together with 12331314419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12331314451) 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, 6165657210 + 6165657211.

It is an arithmetic number, because the mean of its divisors is an integer number (6165657211).

Almost surely, 2^12331314421 is an apocalyptic number.

It is an amenable number.

12331314421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331314421 is an equidigital number, since it uses as much as digits as its factorization.

12331314421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

Adding to 12331314421 its reverse (12441313321), we get a palindrome (24772627742).

The spelling of 12331314421 in words is "twelve billion, three hundred thirty-one million, three hundred fourteen thousand, four hundred twenty-one".