12220222312321 has 2 divisors, whose sum is σ = 12220222312322. Its totient is φ = 12220222312320.

The previous prime is 12220222312261. The next prime is 12220222312369. The reversal of 12220222312321 is 12321322202221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7515487790721 + 4704734521600 = 2741439^2 + 2169040^2 .

It is a cyclic number.

It is not a de Polignac number, because 12220222312321 - 2¹¹ = 12220222310273 is a prime.

It is not a weakly prime, because it can be changed into another prime (12220222312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110111156160 + 6110111156161.

It is an arithmetic number, because the mean of its divisors is an integer number (6110111156161).

Almost surely, 2^{12220222312321} is an apocalyptic number.

It is an amenable number.

12220222312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220222312321 is an equidigital number, since it uses as much as digits as its factorization.

12220222312321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12220222312321 its reverse (12321322202221), we get a palindrome (24541544514542).

The spelling of 12220222312321 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-two million, three hundred twelve thousand, three hundred twenty-one".