12123122939 has 2 divisors, whose sum is σ = 12123122940. Its totient is φ = 12123122938.

The previous prime is 12123122929. The next prime is 12123122983. The reversal of 12123122939 is 93922132121.

It is a weak prime.

It is an emirp because it is prime and its reverse (93922132121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12123122939 - 2²⁴ = 12106345723 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 12123122899 and 12123122908.

It is not a weakly prime, because it can be changed into another prime (12123122929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061561469 + 6061561470.

It is an arithmetic number, because the mean of its divisors is an integer number (6061561470).

Almost surely, 2^12123122939 is an apocalyptic number.

12123122939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123122939 is an equidigital number, since it uses as much as digits as its factorization.

12123122939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The spelling of 12123122939 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-two thousand, nine hundred thirty-nine".