321312300021 has 12 divisors (see below), whose sum is σ = 464443939648. Its totient is φ = 214057658664.

The previous prime is 321312300013. The next prime is 321312300037. The reversal of 321312300021 is 120003213123.

321312300021 is a `hidden beast` number, since 32 + 1 + 312 + 300 + 0 + 21 = 666.

It is not a de Polignac number, because 321312300021 - 2³ = 321312300013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321312299967 and 321312300003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321312300011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12531595 + ... + 12557208.

Almost surely, 2^321312300021 is an apocalyptic number.

It is an amenable number.

321312300021 is a deficient number, since it is larger than the sum of its proper divisors (143131639627).

321312300021 is a wasteful number, since it uses less digits than its factorization.

321312300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25090232 (or 25090229 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 321312300021 its reverse (120003213123), we get a palindrome (441315513144).

The spelling of 321312300021 in words is "three hundred twenty-one billion, three hundred twelve million, three hundred thousand, twenty-one".