3211221 has 8 divisors (see below), whose sum is σ = 4611040. Its totient is φ = 1976112.

The previous prime is 3211213. The next prime is 3211279. The reversal of 3211221 is 1221123.

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

It is not a de Polignac number, because 3211221 - 2³ = 3211213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3211197 and 3211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211291) 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, 41131 + ... + 41208.

It is an arithmetic number, because the mean of its divisors is an integer number (576380).

Almost surely, 2^3211221 is an apocalyptic number.

It is an amenable number.

3211221 is a deficient number, since it is larger than the sum of its proper divisors (1399819).

3211221 is a wasteful number, since it uses less digits than its factorization.

3211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82355.

The product of its digits is 24, while the sum is 12.

The square root of 3211221 is about 1791.9880021920. The cubic root of 3211221 is about 147.5333028317.

Adding to 3211221 its reverse (1221123), we get a palindrome (4432344).

It can be divided in two parts, 321122 and 1, that added together give a palindrome (321123).

The spelling of 3211221 in words is "three million, two hundred eleven thousand, two hundred twenty-one".