321423040321 has 2 divisors, whose sum is σ = 321423040322. Its totient is φ = 321423040320.

The previous prime is 321423040249. The next prime is 321423040343. The reversal of 321423040321 is 123040324123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178962841600 + 142460198721 = 423040^2 + 377439^2 .

It is an emirp because it is prime and its reverse (123040324123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321423040321 - 2²¹ = 321420943169 is a prime.

It is not a weakly prime, because it can be changed into another prime (321423040021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160711520160 + 160711520161.

It is an arithmetic number, because the mean of its divisors is an integer number (160711520161).

Almost surely, 2^321423040321 is an apocalyptic number.

It is an amenable number.

321423040321 is a deficient number, since it is larger than the sum of its proper divisors (1).

321423040321 is an equidigital number, since it uses as much as digits as its factorization.

321423040321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 321423040321 its reverse (123040324123), we get a palindrome (444463364444).

The spelling of 321423040321 in words is "three hundred twenty-one billion, four hundred twenty-three million, forty thousand, three hundred twenty-one".