321312443443 has 2 divisors, whose sum is σ = 321312443444. Its totient is φ = 321312443442.

The previous prime is 321312443393. The next prime is 321312443467. The reversal of 321312443443 is 344344213123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321312443443 - 2¹³ = 321312435251 is a prime.

It is a super-2 number, since 2×321312443443² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321312443399 and 321312443408.

It is not a weakly prime, because it can be changed into another prime (321312440443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160656221721 + 160656221722.

It is an arithmetic number, because the mean of its divisors is an integer number (160656221722).

Almost surely, 2^321312443443 is an apocalyptic number.

321312443443 is a deficient number, since it is larger than the sum of its proper divisors (1).

321312443443 is an equidigital number, since it uses as much as digits as its factorization.

321312443443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 34.

Adding to 321312443443 its reverse (344344213123), we get a palindrome (665656656566).

The spelling of 321312443443 in words is "three hundred twenty-one billion, three hundred twelve million, four hundred forty-three thousand, four hundred forty-three".