321123343321111 has 2 divisors, whose sum is σ = 321123343321112. Its totient is φ = 321123343321110.

The previous prime is 321123343321049. The next prime is 321123343321141. The reversal of 321123343321111 is 111123343321123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321123343321111 - 2²³ = 321123334932503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321123343321141) 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, 160561671660555 + 160561671660556.

It is an arithmetic number, because the mean of its divisors is an integer number (160561671660556).

Almost surely, 2^{321123343321111} is an apocalyptic number.

321123343321111 is a deficient number, since it is larger than the sum of its proper divisors (1).

321123343321111 is an equidigital number, since it uses as much as digits as its factorization.

321123343321111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

Adding to 321123343321111 its reverse (111123343321123), we get a palindrome (432246686642234).

The spelling of 321123343321111 in words is "three hundred twenty-one trillion, one hundred twenty-three billion, three hundred forty-three million, three hundred twenty-one thousand, one hundred eleven".