12004123015 has 4 divisors (see below), whose sum is σ = 14404947624. Its totient is φ = 9603298408.

The previous prime is 12004122997. The next prime is 12004123057. The reversal of 12004123015 is 51032140021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51032140021 = 157277 ⋅324473.

It is a cyclic number.

It is not a de Polignac number, because 12004123015 - 2¹⁵ = 12004090247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12004122983 and 12004123001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200412297 + ... + 1200412306.

It is an arithmetic number, because the mean of its divisors is an integer number (3601236906).

Almost surely, 2^12004123015 is an apocalyptic number.

12004123015 is a deficient number, since it is larger than the sum of its proper divisors (2400824609).

12004123015 is an equidigital number, since it uses as much as digits as its factorization.

12004123015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400824608.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 12004123015 its reverse (51032140021), we get a palindrome (63036263036).

The spelling of 12004123015 in words is "twelve billion, four million, one hundred twenty-three thousand, fifteen".