3221421320 has 32 divisors (see below), whose sum is σ = 7805752920. Its totient is φ = 1189447680.

The previous prime is 3221421311. The next prime is 3221421347. The reversal of 3221421320 is 231241223.

It can be written as a sum of positive squares in 4 ways, for example, as 1556618116 + 1664803204 = 39454^2 + 40802^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3221421292 and 3221421301.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3097001 + ... + 3098040.

Almost surely, 2^3221421320 is an apocalyptic number.

It is an amenable number.

3221421320 is an abundant number, since it is smaller than the sum of its proper divisors (4584331600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221421320 is a wasteful number, since it uses less digits than its factorization.

3221421320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6195065 (or 6195061 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3221421320 is about 56757.5661916541. The cubic root of 3221421320 is about 1476.8934901063.

Adding to 3221421320 its reverse (231241223), we get a palindrome (3452662543).

The spelling of 3221421320 in words is "three billion, two hundred twenty-one million, four hundred twenty-one thousand, three hundred twenty".