321221330 has 8 divisors (see below), whose sum is σ = 578198412. Its totient is φ = 128488528.

The previous prime is 321221293. The next prime is 321221357. The reversal of 321221330 is 33122123.

It can be written as a sum of positive squares in 2 ways, for example, as 320517409 + 703921 = 17903^2 + 839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 321221299 and 321221308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16061057 + ... + 16061076.

Almost surely, 2^321221330 is an apocalyptic number.

321221330 is a deficient number, since it is larger than the sum of its proper divisors (256977082).

321221330 is a wasteful number, since it uses less digits than its factorization.

321221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32122140.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321221330 is about 17922.6485207962. The cubic root of 321221330 is about 684.8594593305.

Adding to 321221330 its reverse (33122123), we get a palindrome (354343453).

It can be divided in two parts, 3212 and 21330, that added together give a palindrome (24542).

The spelling of 321221330 in words is "three hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty".