12123133123 has 2 divisors, whose sum is σ = 12123133124. Its totient is φ = 12123133122.

The previous prime is 12123133097. The next prime is 12123133153. The reversal of 12123133123 is 32133132121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12123133123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12123133094 and 12123133103.

It is not a weakly prime, because it can be changed into another prime (12123133153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061566561 + 6061566562.

It is an arithmetic number, because the mean of its divisors is an integer number (6061566562).

Almost surely, 2^12123133123 is an apocalyptic number.

12123133123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12123133123 is an equidigital number, since it uses as much as digits as its factorization.

12123133123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

Adding to 12123133123 its reverse (32133132121), we get a palindrome (44256265244).

The spelling of 12123133123 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-three thousand, one hundred twenty-three".