12013121130123 has 4 divisors (see below), whose sum is σ = 16017494840168. Its totient is φ = 8008747420080.

The previous prime is 12013121130107. The next prime is 12013121130151. The reversal of 12013121130123 is 32103112131021.

12013121130123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12013121130123 - 2⁴ = 12013121130107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12013121130123.

It is not an unprimeable number, because it can be changed into a prime (12013121130103) 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, 2002186855018 + ... + 2002186855023.

It is an arithmetic number, because the mean of its divisors is an integer number (4004373710042).

Almost surely, 2^{12013121130123} is an apocalyptic number.

12013121130123 is a deficient number, since it is larger than the sum of its proper divisors (4004373710045).

12013121130123 is an equidigital number, since it uses as much as digits as its factorization.

12013121130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004373710044.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 12013121130123 its reverse (32103112131021), we get a palindrome (44116233261144).

The spelling of 12013121130123 in words is "twelve trillion, thirteen billion, one hundred twenty-one million, one hundred thirty thousand, one hundred twenty-three".