12112321013 has 4 divisors (see below), whose sum is σ = 13044038028. Its totient is φ = 11180604000.

The previous prime is 12112321003. The next prime is 12112321051. The reversal of 12112321013 is 31012321121.

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 7344832804 + 4767488209 = 85702^2 + 69047^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112321013 - 2⁶ = 12112320949 is a prime.

It is a super-2 number, since 2×12112321013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112320982 and 12112321000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112321003) 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, 465858488 + ... + 465858513.

It is an arithmetic number, because the mean of its divisors is an integer number (3261009507).

Almost surely, 2^12112321013 is an apocalyptic number.

12112321013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12112321013 is a deficient number, since it is larger than the sum of its proper divisors (931717015).

12112321013 is an equidigital number, since it uses as much as digits as its factorization.

12112321013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931717014.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12112321013 its reverse (31012321121), we get a palindrome (43124642134).

The spelling of 12112321013 in words is "twelve billion, one hundred twelve million, three hundred twenty-one thousand, thirteen".