321212221943 has 2 divisors, whose sum is σ = 321212221944. Its totient is φ = 321212221942.

The previous prime is 321212221927. The next prime is 321212221997. The reversal of 321212221943 is 349122212123.

It is a weak prime.

It is an emirp because it is prime and its reverse (349122212123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321212221943 - 2⁴ = 321212221927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321212221903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160606110971 + 160606110972.

It is an arithmetic number, because the mean of its divisors is an integer number (160606110972).

Almost surely, 2^321212221943 is an apocalyptic number.

321212221943 is a deficient number, since it is larger than the sum of its proper divisors (1).

321212221943 is an equidigital number, since it uses as much as digits as its factorization.

321212221943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The spelling of 321212221943 in words is "three hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, nine hundred forty-three".