321123343321723 has 2 divisors, whose sum is σ = 321123343321724. Its totient is φ = 321123343321722.

The previous prime is 321123343321721. The next prime is 321123343321789. The reversal of 321123343321723 is 327123343321123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321123343321723 - 2¹ = 321123343321721 is a prime.

It is a super-2 number, since 2×321123343321723² (a number of 30 digits) contains 22 as substring.

Together with 321123343321721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321123343321721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160561671660861 + 160561671660862.

It is an arithmetic number, because the mean of its divisors is an integer number (160561671660862).

Almost surely, 2^{321123343321723} is an apocalyptic number.

321123343321723 is a deficient number, since it is larger than the sum of its proper divisors (1).

321123343321723 is an equidigital number, since it uses as much as digits as its factorization.

321123343321723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 40.

Adding to 321123343321723 its reverse (327123343321123), we get a palindrome (648246686642846).

The spelling of 321123343321723 in words is "three hundred twenty-one trillion, one hundred twenty-three billion, three hundred forty-three million, three hundred twenty-one thousand, seven hundred twenty-three".