321424310310021 has 6 divisors (see below), whose sum is σ = 464279559336710. Its totient is φ = 214282873540008.

The previous prime is 321424310310011. The next prime is 321424310310067. The reversal of 321424310310021 is 120013013424123.

321424310310021 is a `hidden beast` number, since 3 + 2 + 14 + 2 + 4 + 310 + 310 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 183323855201796 + 138100455108225 = 13539714^2 + 11751615^2 .

It is not a de Polignac number, because 321424310310021 - 2²³ = 321424301921413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321424310310011) 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 in 5 ways as a sum of consecutive naturals, for example, 17856906128326 + ... + 17856906128343.

Almost surely, 2^{321424310310021} is an apocalyptic number.

It is an amenable number.

321424310310021 is a deficient number, since it is larger than the sum of its proper divisors (142855249026689).

321424310310021 is a wasteful number, since it uses less digits than its factorization.

321424310310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35713812256675 (or 35713812256672 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 321424310310021 its reverse (120013013424123), we get a palindrome (441437323734144).

The spelling of 321424310310021 in words is "three hundred twenty-one trillion, four hundred twenty-four billion, three hundred ten million, three hundred ten thousand, twenty-one".