12123020311 has 2 divisors, whose sum is σ = 12123020312. Its totient is φ = 12123020310.

The previous prime is 12123020269. The next prime is 12123020317. The reversal of 12123020311 is 11302032121.

12123020311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12123020311 - 2⁷ = 12123020183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12123020317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061510155 + 6061510156.

It is an arithmetic number, because the mean of its divisors is an integer number (6061510156).

Almost surely, 2^12123020311 is an apocalyptic number.

12123020311 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123020311 is an equidigital number, since it uses as much as digits as its factorization.

12123020311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12123020311 its reverse (11302032121), we get a palindrome (23425052432).

The spelling of 12123020311 in words is "twelve billion, one hundred twenty-three million, twenty thousand, three hundred eleven".