321420033021331 has 2 divisors, whose sum is σ = 321420033021332. Its totient is φ = 321420033021330.

The previous prime is 321420033021293. The next prime is 321420033021377. The reversal of 321420033021331 is 133120330024123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321420033021331 - 2¹⁷ = 321420032890259 is a prime.

It is a super-3 number, since 3×321420033021331³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 321420033021331.

It is not a weakly prime, because it can be changed into another prime (321420003021331) 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, 160710016510665 + 160710016510666.

It is an arithmetic number, because the mean of its divisors is an integer number (160710016510666).

Almost surely, 2^{321420033021331} is an apocalyptic number.

321420033021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

321420033021331 is an equidigital number, since it uses as much as digits as its factorization.

321420033021331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 321420033021331 its reverse (133120330024123), we get a palindrome (454540363045454).

The spelling of 321420033021331 in words is "three hundred twenty-one trillion, four hundred twenty billion, thirty-three million, twenty-one thousand, three hundred thirty-one".