1322221220321 has 2 divisors, whose sum is σ = 1322221220322. Its totient is φ = 1322221220320.

The previous prime is 1322221220273. The next prime is 1322221220339. The reversal of 1322221220321 is 1230221222231.

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., 1315735173025 + 6486047296 = 1147055^2 + 80536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1322221220321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1322221220351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661110610160 + 661110610161.

It is an arithmetic number, because the mean of its divisors is an integer number (661110610161).

Almost surely, 2^{1322221220321} is an apocalyptic number.

It is an amenable number.

1322221220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322221220321 is an equidigital number, since it uses as much as digits as its factorization.

1322221220321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1322221220321 its reverse (1230221222231), we get a palindrome (2552442442552).

The spelling of 1322221220321 in words is "one trillion, three hundred twenty-two billion, two hundred twenty-one million, two hundred twenty thousand, three hundred twenty-one".