3220223021 has 4 divisors (see below), whose sum is σ = 3228334812. Its totient is φ = 3212111232.

The previous prime is 3220222987. The next prime is 3220223023. The reversal of 3220223021 is 1203220223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203220223 = 4703 ⋅255841.

It can be written as a sum of positive squares in 2 ways, for example, as 2917080100 + 303142921 = 54010^2 + 17411^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220223021 - 2¹⁴ = 3220206637 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 (3220223023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4055300 + ... + 4056093.

It is an arithmetic number, because the mean of its divisors is an integer number (807083703).

Almost surely, 2^3220223021 is an apocalyptic number.

It is an amenable number.

3220223021 is a deficient number, since it is larger than the sum of its proper divisors (8111791).

3220223021 is an equidigital number, since it uses as much as digits as its factorization.

3220223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111790.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 3220223021 is about 56747.0089167702. The cubic root of 3220223021 is about 1476.7103432591.

Adding to 3220223021 its reverse (1203220223), we get a palindrome (4423443244).

The spelling of 3220223021 in words is "three billion, two hundred twenty million, two hundred twenty-three thousand, twenty-one".