12001223120123 has 4 divisors (see below), whose sum is σ = 12031452901680. Its totient is φ = 11970993338568.

The previous prime is 12001223120053. The next prime is 12001223120141. The reversal of 12001223120123 is 32102132210021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12001223120123 - 2⁸ = 12001223119867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001223120095 and 12001223120104.

It is not an unprimeable number, because it can be changed into a prime (12001223129123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15114890183 + ... + 15114890976.

It is an arithmetic number, because the mean of its divisors is an integer number (3007863225420).

Almost surely, 2^{12001223120123} is an apocalyptic number.

12001223120123 is a deficient number, since it is larger than the sum of its proper divisors (30229781557).

12001223120123 is an equidigital number, since it uses as much as digits as its factorization.

12001223120123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30229781556.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12001223120123 its reverse (32102132210021), we get a palindrome (44103355330144).

The spelling of 12001223120123 in words is "twelve trillion, one billion, two hundred twenty-three million, one hundred twenty thousand, one hundred twenty-three".