12121122112123 has 2 divisors, whose sum is σ = 12121122112124. Its totient is φ = 12121122112122.

The previous prime is 12121122112103. The next prime is 12121122112157. The reversal of 12121122112123 is 32121122112121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121122112123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121122112094 and 12121122112103.

It is not a weakly prime, because it can be changed into another prime (12121122112103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060561056061 + 6060561056062.

It is an arithmetic number, because the mean of its divisors is an integer number (6060561056062).

Almost surely, 2^{12121122112123} is an apocalyptic number.

12121122112123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121122112123 is an equidigital number, since it uses as much as digits as its factorization.

12121122112123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 22.

Adding to 12121122112123 its reverse (32121122112121), we get a palindrome (44242244224244).

The spelling of 12121122112123 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred twenty-three".