1321111423343 has 2 divisors, whose sum is σ = 1321111423344. Its totient is φ = 1321111423342.

The previous prime is 1321111423297. The next prime is 1321111423361. The reversal of 1321111423343 is 3433241111231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321111423343 - 2³² = 1316816456047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321111423043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660555711671 + 660555711672.

It is an arithmetic number, because the mean of its divisors is an integer number (660555711672).

Almost surely, 2^{1321111423343} is an apocalyptic number.

1321111423343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321111423343 is an equidigital number, since it uses as much as digits as its factorization.

1321111423343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

Adding to 1321111423343 its reverse (3433241111231), we get a palindrome (4754352534574).

The spelling of 1321111423343 in words is "one trillion, three hundred twenty-one billion, one hundred eleven million, four hundred twenty-three thousand, three hundred forty-three".