12311611321 has 4 divisors (see below), whose sum is σ = 12431141632. Its totient is φ = 12192081012.

The previous prime is 12311611289. The next prime is 12311611357.

It is a happy number.

12311611321 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12311611321 - 2⁵ = 12311611289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311611292 and 12311611301.

It is not an unprimeable number, because it can be changed into a prime (12311611381) 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, 59765001 + ... + 59765206.

It is an arithmetic number, because the mean of its divisors is an integer number (3107785408).

Almost surely, 2^12311611321 is an apocalyptic number.

It is an amenable number.

12311611321 is a deficient number, since it is larger than the sum of its proper divisors (119530311).

12311611321 is a wasteful number, since it uses less digits than its factorization.

12311611321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119530310.

The product of its digits is 216, while the sum is 22.

The spelling of 12311611321 in words is "twelve billion, three hundred eleven million, six hundred eleven thousand, three hundred twenty-one".