12123232013 has 8 divisors (see below), whose sum is σ = 12215716920. Its totient is φ = 12031098880.

The previous prime is 12123231997. The next prime is 12123232021. The reversal of 12123232013 is 31023232121.

It can be written as a sum of positive squares in 4 ways, for example, as 5253640324 + 6869591689 = 72482^2 + 82883^2 .

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 12123232013 - 2⁴ = 12123231997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123232063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18548 + ... + 156813.

It is an arithmetic number, because the mean of its divisors is an integer number (1526964615).

Almost surely, 2^12123232013 is an apocalyptic number.

It is an amenable number.

12123232013 is a deficient number, since it is larger than the sum of its proper divisors (92484907).

12123232013 is a wasteful number, since it uses less digits than its factorization.

12123232013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175887.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12123232013 its reverse (31023232121), we get a palindrome (43146464134).

The spelling of 12123232013 in words is "twelve billion, one hundred twenty-three million, two hundred thirty-two thousand, thirteen".