3231211032221 has 4 divisors (see below), whose sum is σ = 3233101736700. Its totient is φ = 3229320327744.

The previous prime is 3231211032197. The next prime is 3231211032227. The reversal of 3231211032221 is 1222301121323.

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 1034919636100 + 2196291396121 = 1017310^2 + 1481989^2 .

It is a cyclic number.

It is not a de Polignac number, because 3231211032221 - 2²² = 3231206837917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231211032227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945349676 + ... + 945353093.

It is an arithmetic number, because the mean of its divisors is an integer number (808275434175).

Almost surely, 2^{3231211032221} is an apocalyptic number.

It is an amenable number.

3231211032221 is a deficient number, since it is larger than the sum of its proper divisors (1890704479).

3231211032221 is a wasteful number, since it uses less digits than its factorization.

3231211032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890704478.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 3231211032221 its reverse (1222301121323), we get a palindrome (4453512153544).

The spelling of 3231211032221 in words is "three trillion, two hundred thirty-one billion, two hundred eleven million, thirty-two thousand, two hundred twenty-one".