3220320021 has 8 divisors (see below), whose sum is σ = 4432268544. Its totient is φ = 2077625760.

The previous prime is 3220320011. The next prime is 3220320041. The reversal of 3220320021 is 1200230223.

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

It is not a de Polignac number, because 3220320021 - 2⁶ = 3220319957 is a prime.

It is a super-2 number, since 2×3220320021² = 20740922075306880882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220320001) 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, 17313456 + ... + 17313641.

It is an arithmetic number, because the mean of its divisors is an integer number (554033568).

Almost surely, 2^3220320021 is an apocalyptic number.

3220320021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3220320021 is a deficient number, since it is larger than the sum of its proper divisors (1211948523).

3220320021 is a wasteful number, since it uses less digits than its factorization.

3220320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34627131.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 3220320021 is about 56747.8635809314. The cubic root of 3220320021 is about 1476.7251703341.

Adding to 3220320021 its reverse (1200230223), we get a palindrome (4420550244).

The spelling of 3220320021 in words is "three billion, two hundred twenty million, three hundred twenty thousand, twenty-one".