321030421 has 4 divisors (see below), whose sum is σ = 325428172. Its totient is φ = 316632672.

The previous prime is 321030383. The next prime is 321030449. The reversal of 321030421 is 124030123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 176092900 + 144937521 = 13270^2 + 12039^2 .

It is a cyclic number.

It is not a de Polignac number, because 321030421 - 2¹¹ = 321028373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321030395 and 321030404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321030461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2198766 + ... + 2198911.

It is an arithmetic number, because the mean of its divisors is an integer number (81357043).

Almost surely, 2^321030421 is an apocalyptic number.

It is an amenable number.

321030421 is a deficient number, since it is larger than the sum of its proper divisors (4397751).

321030421 is an equidigital number, since it uses as much as digits as its factorization.

321030421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397750.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 321030421 is about 17917.3218143784. The cubic root of 321030421 is about 684.7237566933.

Adding to 321030421 its reverse (124030123), we get a palindrome (445060544).

The spelling of 321030421 in words is "three hundred twenty-one million, thirty thousand, four hundred twenty-one".