3321021 has 16 divisors (see below), whose sum is σ = 4868928. Its totient is φ = 1996800.

The previous prime is 3320971. The next prime is 3321037. The reversal of 3321021 is 1201233.

It is a happy number.

It is not a de Polignac number, because 3321021 - 2⁹ = 3320509 is a prime.

It is a super-2 number, since 2×3321021² = 22058360964882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3320988 and 3321006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3321421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4861 + ... + 5501.

It is an arithmetic number, because the mean of its divisors is an integer number (304308).

Almost surely, 2^3321021 is an apocalyptic number.

It is an amenable number.

3321021 is a deficient number, since it is larger than the sum of its proper divisors (1547907).

3321021 is a wasteful number, since it uses less digits than its factorization.

3321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 3321021 is about 1822.3668675654. The cubic root of 3321021 is about 149.1960094719.

Adding to 3321021 its reverse (1201233), we get a palindrome (4522254).

The spelling of 3321021 in words is "three million, three hundred twenty-one thousand, twenty-one".