3231111312221 has 8 divisors (see below), whose sum is σ = 3564528052344. Its totient is φ = 2909818817280.

The previous prime is 3231111312161. The next prime is 3231111312227. The reversal of 3231111312221 is 1222131111323.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 58170686596 + 3172940625625 = 241186^2 + 1781275^2 .

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-3231111312221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231111312227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3031060736 + ... + 3031061801.

It is an arithmetic number, because the mean of its divisors is an integer number (445566006543).

Almost surely, 2^{3231111312221} is an apocalyptic number.

It is an amenable number.

3231111312221 is a deficient number, since it is larger than the sum of its proper divisors (333416740123).

3231111312221 is a wasteful number, since it uses less digits than its factorization.

3231111312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6062122591.

The product of its digits is 432, while the sum is 23.

Adding to 3231111312221 its reverse (1222131111323), we get a palindrome (4453242423544).

The spelling of 3231111312221 in words is "three trillion, two hundred thirty-one billion, one hundred eleven million, three hundred twelve thousand, two hundred twenty-one".