12123019 has 2 divisors, whose sum is σ = 12123020. Its totient is φ = 12123018.

The previous prime is 12123017. The next prime is 12123029. The reversal of 12123019 is 91032121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12123019 - 2¹ = 12123017 is a prime.

It is a super-2 number, since 2×12123019² = 293935179348722, which contains 22 as substring.

Together with 12123017, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122987 and 12123005.

It is not a weakly prime, because it can be changed into another prime (12123017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061509 + 6061510.

It is an arithmetic number, because the mean of its divisors is an integer number (6061510).

Almost surely, 2^12123019 is an apocalyptic number.

12123019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123019 is an equidigital number, since it uses as much as digits as its factorization.

12123019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 12123019 is about 3481.8126026540. The cubic root of 12123019 is about 229.7225324479.

The spelling of 12123019 in words is "twelve million, one hundred twenty-three thousand, nineteen".