12042042123 has 8 divisors (see below), whose sum is σ = 17000530128. Its totient is φ = 7555791104.

The previous prime is 12042042119. The next prime is 12042042137. The reversal of 12042042123 is 32124024021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12042042123 - 2² = 12042042119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12042042123.

It is not an unprimeable number, because it can be changed into a prime (12042042143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118059186 + ... + 118059287.

It is an arithmetic number, because the mean of its divisors is an integer number (2125066266).

Almost surely, 2^12042042123 is an apocalyptic number.

12042042123 is a deficient number, since it is larger than the sum of its proper divisors (4958488005).

12042042123 is a wasteful number, since it uses less digits than its factorization.

12042042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236118493.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12042042123 its reverse (32124024021), we get a palindrome (44166066144).

The spelling of 12042042123 in words is "twelve billion, forty-two million, forty-two thousand, one hundred twenty-three".