12123320311 has 2 divisors, whose sum is σ = 12123320312. Its totient is φ = 12123320310.

The previous prime is 12123320281. The next prime is 12123320333. The reversal of 12123320311 is 11302332121.

It is a strong prime.

It is an emirp because it is prime and its reverse (11302332121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123320311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12123320351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061660155 + 6061660156.

It is an arithmetic number, because the mean of its divisors is an integer number (6061660156).

Almost surely, 2^12123320311 is an apocalyptic number.

12123320311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123320311 is an equidigital number, since it uses as much as digits as its factorization.

12123320311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12123320311 its reverse (11302332121), we get a palindrome (23425652432).

The spelling of 12123320311 in words is "twelve billion, one hundred twenty-three million, three hundred twenty thousand, three hundred eleven".