1303213232221 has 2 divisors, whose sum is σ = 1303213232222. Its totient is φ = 1303213232220.

The previous prime is 1303213232207. The next prime is 1303213232281. The reversal of 1303213232221 is 1222323123031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1253535508996 + 49677723225 = 1119614^2 + 222885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303213232221 - 2¹¹ = 1303213230173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303213232281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651606616110 + 651606616111.

It is an arithmetic number, because the mean of its divisors is an integer number (651606616111).

Almost surely, 2^{1303213232221} is an apocalyptic number.

It is an amenable number.

1303213232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303213232221 is an equidigital number, since it uses as much as digits as its factorization.

1303213232221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1303213232221 its reverse (1222323123031), we get a palindrome (2525536355252).

The spelling of 1303213232221 in words is "one trillion, three hundred three billion, two hundred thirteen million, two hundred thirty-two thousand, two hundred twenty-one".