3231220001221 has 4 divisors (see below), whose sum is σ = 3231717807744. Its totient is φ = 3230722194700.

The previous prime is 3231220001189. The next prime is 3231220001227. The reversal of 3231220001221 is 1221000221323.

3231220001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3231220001221 - 2⁵ = 3231220001189 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 (3231220001227) 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, 248893525 + ... + 248906506.

It is an arithmetic number, because the mean of its divisors is an integer number (807929451936).

Almost surely, 2^{3231220001221} is an apocalyptic number.

It is an amenable number.

3231220001221 is a deficient number, since it is larger than the sum of its proper divisors (497806523).

3231220001221 is an equidigital number, since it uses as much as digits as its factorization.

3231220001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497806522.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 3231220001221 its reverse (1221000221323), we get a palindrome (4452220222544).

The spelling of 3231220001221 in words is "three trillion, two hundred thirty-one billion, two hundred twenty million, one thousand, two hundred twenty-one".