3220021 has 8 divisors (see below), whose sum is σ = 3896640. Its totient is φ = 2597568.

The previous prime is 3220003. The next prime is 3220027. The reversal of 3220021 is 1200223.

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

It is a cyclic number.

It is not a de Polignac number, because 3220021 - 2⁵ = 3219989 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 (3220027) 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, 13411 + ... + 13648.

It is an arithmetic number, because the mean of its divisors is an integer number (487080).

Almost surely, 2^3220021 is an apocalyptic number.

It is an amenable number.

3220021 is a deficient number, since it is larger than the sum of its proper divisors (676619).

3220021 is a wasteful number, since it uses less digits than its factorization.

3220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27083.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 3220021 is about 1794.4416959043. The cubic root of 3220021 is about 147.6679462092.

Adding to 3220021 its reverse (1200223), we get a palindrome (4420244).

It can be divided in two parts, 322002 and 1, that added together give a triangular number (322003 = T₈₀₂).

The spelling of 3220021 in words is "three million, two hundred twenty thousand, twenty-one".