12121322321 has 2 divisors, whose sum is σ = 12121322322. Its totient is φ = 12121322320.

The previous prime is 12121322267. The next prime is 12121322329. The reversal of 12121322321 is 12322312121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10147741696 + 1973580625 = 100736^2 + 44425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121322321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121322293 and 12121322302.

It is not a weakly prime, because it can be changed into another prime (12121322329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060661160 + 6060661161.

It is an arithmetic number, because the mean of its divisors is an integer number (6060661161).

Almost surely, 2^12121322321 is an apocalyptic number.

It is an amenable number.

12121322321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121322321 is an equidigital number, since it uses as much as digits as its factorization.

12121322321 is an evil number, because the sum of its binary digits is even.

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

Adding to 12121322321 its reverse (12322312121), we get a palindrome (24443634442).

The spelling of 12121322321 in words is "twelve billion, one hundred twenty-one million, three hundred twenty-two thousand, three hundred twenty-one".