321888338641 has 2 divisors, whose sum is σ = 321888338642. Its totient is φ = 321888338640.

The previous prime is 321888338621. The next prime is 321888338663. The reversal of 321888338641 is 146833888123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263498449041 + 58389889600 = 513321^2 + 241640^2 .

It is a cyclic number.

It is not a de Polignac number, because 321888338641 - 2¹¹ = 321888336593 is a prime.

It is a super-2 number, since 2×321888338641² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321888338621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160944169320 + 160944169321.

It is an arithmetic number, because the mean of its divisors is an integer number (160944169321).

Almost surely, 2^321888338641 is an apocalyptic number.

It is an amenable number.

321888338641 is a deficient number, since it is larger than the sum of its proper divisors (1).

321888338641 is an equidigital number, since it uses as much as digits as its factorization.

321888338641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5308416, while the sum is 55.

The spelling of 321888338641 in words is "three hundred twenty-one billion, eight hundred eighty-eight million, three hundred thirty-eight thousand, six hundred forty-one".