12331121321 has 2 divisors, whose sum is σ = 12331121322. Its totient is φ = 12331121320.

The previous prime is 12331121311. The next prime is 12331121357. The reversal of 12331121321 is 12312113321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12290161321 + 40960000 = 110861^2 + 6400^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331121321 - 2¹⁰ = 12331120297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12331121293 and 12331121302.

It is not a weakly prime, because it can be changed into another prime (12331121311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165560660 + 6165560661.

It is an arithmetic number, because the mean of its divisors is an integer number (6165560661).

Almost surely, 2^12331121321 is an apocalyptic number.

It is an amenable number.

12331121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331121321 is an equidigital number, since it uses as much as digits as its factorization.

12331121321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

Adding to 12331121321 its reverse (12312113321), we get a palindrome (24643234642).

The spelling of 12331121321 in words is "twelve billion, three hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty-one".