3304131221 has 4 divisors (see below), whose sum is σ = 3309938700. Its totient is φ = 3298323744.

The previous prime is 3304131209. The next prime is 3304131227. The reversal of 3304131221 is 1221314033.

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 965344900 + 2338786321 = 31070^2 + 48361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3304131221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3304131193 and 3304131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3304131227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902886 + ... + 2904023.

It is an arithmetic number, because the mean of its divisors is an integer number (827484675).

Almost surely, 2^3304131221 is an apocalyptic number.

It is an amenable number.

3304131221 is a deficient number, since it is larger than the sum of its proper divisors (5807479).

3304131221 is an equidigital number, since it uses as much as digits as its factorization.

3304131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807478.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 3304131221 is about 57481.5728820985. The cubic root of 3304131221 is about 1489.4265650690.

Adding to 3304131221 its reverse (1221314033), we get a palindrome (4525445254).

The spelling of 3304131221 in words is "three billion, three hundred four million, one hundred thirty-one thousand, two hundred twenty-one".