12423613121 has 4 divisors (see below), whose sum is σ = 12426415044. Its totient is φ = 12420811200.

The previous prime is 12423613063. The next prime is 12423613219. The reversal of 12423613121 is 12131632421.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5690590096 + 6733023025 = 75436^2 + 82055^2 .

It is a cyclic number.

It is not a de Polignac number, because 12423613121 - 2¹⁴ = 12423596737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12423618121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394300 + ... + 1403181.

It is an arithmetic number, because the mean of its divisors is an integer number (3106603761).

Almost surely, 2^12423613121 is an apocalyptic number.

It is an amenable number.

12423613121 is a deficient number, since it is larger than the sum of its proper divisors (2801923).

12423613121 is an equidigital number, since it uses as much as digits as its factorization.

12423613121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801922.

The product of its digits is 1728, while the sum is 26.

The spelling of 12423613121 in words is "twelve billion, four hundred twenty-three million, six hundred thirteen thousand, one hundred twenty-one".