1321321022443 has 2 divisors, whose sum is σ = 1321321022444. Its totient is φ = 1321321022442.

The previous prime is 1321321022401. The next prime is 1321321022573. The reversal of 1321321022443 is 3442201231231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321321022443 - 2⁹ = 1321321021931 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321321022743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660660511221 + 660660511222.

It is an arithmetic number, because the mean of its divisors is an integer number (660660511222).

Almost surely, 2^{1321321022443} is an apocalyptic number.

1321321022443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321321022443 is an equidigital number, since it uses as much as digits as its factorization.

1321321022443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1321321022443 its reverse (3442201231231), we get a palindrome (4763522253674).

The spelling of 1321321022443 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-one million, twenty-two thousand, four hundred forty-three".