12321311121 has 72 divisors (see below), whose sum is σ = 21834839520. Its totient is φ = 6657323904.

The previous prime is 12321311099. The next prime is 12321311131. The reversal of 12321311121 is 12111312321.

12321311121 is a `hidden beast` number, since 1 + 232 + 1 + 311 + 121 = 666.

It is not a de Polignac number, because 12321311121 - 2⁷ = 12321310993 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12321311094 and 12321311103.

It is not an unprimeable number, because it can be changed into a prime (12321311131) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5721781 + ... + 5723933.

It is an arithmetic number, because the mean of its divisors is an integer number (303261660).

Almost surely, 2^12321311121 is an apocalyptic number.

It is an amenable number.

12321311121 is a deficient number, since it is larger than the sum of its proper divisors (9513528399).

12321311121 is a wasteful number, since it uses less digits than its factorization.

12321311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875 (or 2865 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 12321311121 its reverse (12111312321), we get a palindrome (24432623442).

The spelling of 12321311121 in words is "twelve billion, three hundred twenty-one million, three hundred eleven thousand, one hundred twenty-one".