12321222020021 has 2 divisors, whose sum is σ = 12321222020022. Its totient is φ = 12321222020020.

The previous prime is 12321222019979. The next prime is 12321222020069. The reversal of 12321222020021 is 12002022212321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9897875995921 + 2423346024100 = 3146089^2 + 1556710^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321222020021 - 2¹⁸ = 12321221757877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12321222019975 and 12321222020002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12321222010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160611010010 + 6160611010011.

It is an arithmetic number, because the mean of its divisors is an integer number (6160611010011).

Almost surely, 2^{12321222020021} is an apocalyptic number.

It is an amenable number.

12321222020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321222020021 is an equidigital number, since it uses as much as digits as its factorization.

12321222020021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12321222020021 its reverse (12002022212321), we get a palindrome (24323244232342).

The spelling of 12321222020021 in words is "twelve trillion, three hundred twenty-one billion, two hundred twenty-two million, twenty thousand, twenty-one".