12123330391 has 2 divisors, whose sum is σ = 12123330392. Its totient is φ = 12123330390.

The previous prime is 12123330389. The next prime is 12123330403. The reversal of 12123330391 is 19303332121.

It is a weak prime.

It is an emirp because it is prime and its reverse (19303332121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12123330391 - 2¹ = 12123330389 is a prime.

Together with 12123330389, 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 (12123331391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061665195 + 6061665196.

It is an arithmetic number, because the mean of its divisors is an integer number (6061665196).

Almost surely, 2^12123330391 is an apocalyptic number.

12123330391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123330391 is an equidigital number, since it uses as much as digits as its factorization.

12123330391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 12123330391 in words is "twelve billion, one hundred twenty-three million, three hundred thirty thousand, three hundred ninety-one".