12321222113 has 4 divisors (see below), whose sum is σ = 12321614868. Its totient is φ = 12320829360.

The previous prime is 12321222077. The next prime is 12321222139. The reversal of 12321222113 is 31122212321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31122212321 = 137 ⋅227169433.

It can be written as a sum of positive squares in 2 ways, for example, as 6401920144 + 5919301969 = 80012^2 + 76937^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321222113 - 2¹² = 12321218017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12321222013) 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, 144806 + ... + 213567.

It is an arithmetic number, because the mean of its divisors is an integer number (3080403717).

Almost surely, 2^12321222113 is an apocalyptic number.

It is an amenable number.

12321222113 is a deficient number, since it is larger than the sum of its proper divisors (392755).

12321222113 is an equidigital number, since it uses as much as digits as its factorization.

12321222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392754.

The product of its digits is 288, while the sum is 20.

Adding to 12321222113 its reverse (31122212321), we get a palindrome (43443434434).

The spelling of 12321222113 in words is "twelve billion, three hundred twenty-one million, two hundred twenty-two thousand, one hundred thirteen".