321030300021 has 16 divisors (see below), whose sum is σ = 430631308800. Its totient is φ = 212728632048.

The previous prime is 321030300011. The next prime is 321030300043. The reversal of 321030300021 is 120003030123.

It is not a de Polignac number, because 321030300021 - 2²² = 321026105717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321030300011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154831 + ... + 816108.

It is an arithmetic number, because the mean of its divisors is an integer number (26914456800).

Almost surely, 2^321030300021 is an apocalyptic number.

It is an amenable number.

321030300021 is a deficient number, since it is larger than the sum of its proper divisors (109601008779).

321030300021 is a wasteful number, since it uses less digits than its factorization.

321030300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971608.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 321030300021 its reverse (120003030123), we get a palindrome (441033330144).

The spelling of 321030300021 in words is "three hundred twenty-one billion, thirty million, three hundred thousand, twenty-one".