3321221 has 4 divisors (see below), whose sum is σ = 3335244. Its totient is φ = 3307200.

The previous prime is 3321217. The next prime is 3321229. The reversal of 3321221 is 1221233.

It is a happy number.

3321221 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 an emirpimes, since its reverse is a distinct semiprime: 1221233 = 13 ⋅93941.

It can be written as a sum of positive squares in 2 ways, for example, as 2208196 + 1113025 = 1486^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3321221 - 2² = 3321217 is a prime.

It is a super-2 number, since 2×3321221² = 22061017861682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3321196 and 3321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3321229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6650 + ... + 7131.

It is an arithmetic number, because the mean of its divisors is an integer number (833811).

Almost surely, 2^3321221 is an apocalyptic number.

It is an amenable number.

3321221 is a deficient number, since it is larger than the sum of its proper divisors (14023).

3321221 is a wasteful number, since it uses less digits than its factorization.

3321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14022.

The product of its digits is 72, while the sum is 14.

The square root of 3321221 is about 1822.4217404322. The cubic root of 3321221 is about 149.1990043945.

Adding to 3321221 its reverse (1221233), we get a palindrome (4542454).

It can be divided in two parts, 33212 and 21, that added together give a palindrome (33233).

The spelling of 3321221 in words is "three million, three hundred twenty-one thousand, two hundred twenty-one".