1321430120443 has 2 divisors, whose sum is σ = 1321430120444. Its totient is φ = 1321430120442.

The previous prime is 1321430120441. The next prime is 1321430120459. The reversal of 1321430120443 is 3440210341231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321430120443 - 2¹ = 1321430120441 is a prime.

Together with 1321430120441, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1321430120441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660715060221 + 660715060222.

It is an arithmetic number, because the mean of its divisors is an integer number (660715060222).

Almost surely, 2^{1321430120443} is an apocalyptic number.

1321430120443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321430120443 is an equidigital number, since it uses as much as digits as its factorization.

1321430120443 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1321430120443 its reverse (3440210341231), we get a palindrome (4761640461674).

The spelling of 1321430120443 in words is "one trillion, three hundred twenty-one billion, four hundred thirty million, one hundred twenty thousand, four hundred forty-three".