12322120021 has 2 divisors, whose sum is σ = 12322120022. Its totient is φ = 12322120020.

The previous prime is 12322120007. The next prime is 12322120051. The reversal of 12322120021 is 12002122321.

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., 9065705796 + 3256414225 = 95214^2 + 57065^2 .

It is a cyclic number.

It is not a de Polignac number, because 12322120021 - 2²⁹ = 11785249109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12322119977 and 12322120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12322120001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6161060010 + 6161060011.

It is an arithmetic number, because the mean of its divisors is an integer number (6161060011).

Almost surely, 2^12322120021 is an apocalyptic number.

It is an amenable number.

12322120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12322120021 is an equidigital number, since it uses as much as digits as its factorization.

12322120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12322120021 its reverse (12002122321), we get a palindrome (24324242342).

The spelling of 12322120021 in words is "twelve billion, three hundred twenty-two million, one hundred twenty thousand, twenty-one".