12123122133123 has 10 divisors (see below), whose sum is σ = 18109849112564. Its totient is φ = 8082081422028.

The previous prime is 12123122133121. The next prime is 12123122133127. The reversal of 12123122133123 is 32133122132121.

12123122133123 is a `hidden beast` number, since 1 + 2 + 12 + 312 + 2 + 1 + 331 + 2 + 3 = 666.

It is not a de Polignac number, because 12123122133123 - 2¹ = 12123122133121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123122133121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74834087161 + ... + 74834087322.

Almost surely, 2^{12123122133123} is an apocalyptic number.

12123122133123 is a deficient number, since it is larger than the sum of its proper divisors (5986726979441).

12123122133123 is an equidigital number, since it uses as much as digits as its factorization.

12123122133123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149668174495 (or 149668174486 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 12123122133123 its reverse (32133122132121), we get a palindrome (44256244265244).

The spelling of 12123122133123 in words is "twelve trillion, one hundred twenty-three billion, one hundred twenty-two million, one hundred thirty-three thousand, one hundred twenty-three".