222021320321 has 2 divisors, whose sum is σ = 222021320322. Its totient is φ = 222021320320.

The previous prime is 222021320267. The next prime is 222021320347. The reversal of 222021320321 is 123023120222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204181978225 + 17839342096 = 451865^2 + 133564^2 .

It is a cyclic number.

It is not a de Polignac number, because 222021320321 - 2¹⁴ = 222021303937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222021320293 and 222021320302.

It is not a weakly prime, because it can be changed into another prime (222021320221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010660160 + 111010660161.

It is an arithmetic number, because the mean of its divisors is an integer number (111010660161).

Almost surely, 2^222021320321 is an apocalyptic number.

It is an amenable number.

222021320321 is a deficient number, since it is larger than the sum of its proper divisors (1).

222021320321 is an equidigital number, since it uses as much as digits as its factorization.

222021320321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 222021320321 its reverse (123023120222), we get a palindrome (345044440543).

The spelling of 222021320321 in words is "two hundred twenty-two billion, twenty-one million, three hundred twenty thousand, three hundred twenty-one".