3231020221 has 16 divisors (see below), whose sum is σ = 4019174208. Its totient is φ = 2551852800.

The previous prime is 3231020203. The next prime is 3231020231. The reversal of 3231020221 is 1220201323.

3231020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3231020221 - 2²¹ = 3228923069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3231020195 and 3231020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3231020231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 662115 + ... + 666976.

It is an arithmetic number, because the mean of its divisors is an integer number (251198388).

Almost surely, 2^3231020221 is an apocalyptic number.

It is an amenable number.

3231020221 is a deficient number, since it is larger than the sum of its proper divisors (788153987).

3231020221 is a wasteful number, since it uses less digits than its factorization.

3231020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329132.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3231020221 is about 56842.0638348046. The cubic root of 3231020221 is about 1478.3589402479.

Adding to 3231020221 its reverse (1220201323), we get a palindrome (4451221544).

The spelling of 3231020221 in words is "three billion, two hundred thirty-one million, twenty thousand, two hundred twenty-one".