3231321221 has 8 divisors (see below), whose sum is σ = 3389288640. Its totient is φ = 3074810112.

The previous prime is 3231321187. The next prime is 3231321229. The reversal of 3231321221 is 1221231323.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3231321221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3231321193 and 3231321202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231321229) 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 7 ways as a sum of consecutive naturals, for example, 359531 + ... + 368408.

It is an arithmetic number, because the mean of its divisors is an integer number (423661080).

Almost surely, 2^3231321221 is an apocalyptic number.

It is an amenable number.

3231321221 is a deficient number, since it is larger than the sum of its proper divisors (157967419).

3231321221 is a wasteful number, since it uses less digits than its factorization.

3231321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728155.

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

The square root of 3231321221 is about 56844.7114602581. The cubic root of 3231321221 is about 1478.4048465142.

Adding to 3231321221 its reverse (1221231323), we get a palindrome (4452552544).

The spelling of 3231321221 in words is "three billion, two hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty-one".