3220003021 has 8 divisors (see below), whose sum is σ = 3240196344. Its totient is φ = 3199848960.

The previous prime is 3220003009. The next prime is 3220003027. The reversal of 3220003021 is 1203000223.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 237314025 + 2982688996 = 15405^2 + 54614^2 .

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 3220003021 - 2⁹ = 3220002509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3220002992 and 3220003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220003027) 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, 164281 + ... + 182833.

It is an arithmetic number, because the mean of its divisors is an integer number (405024543).

Almost surely, 2^3220003021 is an apocalyptic number.

It is an amenable number.

3220003021 is a deficient number, since it is larger than the sum of its proper divisors (20193323).

3220003021 is a wasteful number, since it uses less digits than its factorization.

3220003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19631.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 3220003021 is about 56745.0704555030. The cubic root of 3220003021 is about 1476.6767137380.

Adding to 3220003021 its reverse (1203000223), we get a palindrome (4423003244).

The spelling of 3220003021 in words is "three billion, two hundred twenty million, three thousand, twenty-one".