3221424021 has 4 divisors (see below), whose sum is σ = 4295232032. Its totient is φ = 2147616012.

The previous prime is 3221424007. The next prime is 3221424047. The reversal of 3221424021 is 1204241223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3221424021 - 2⁶ = 3221423957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221424221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536904001 + ... + 536904006.

It is an arithmetic number, because the mean of its divisors is an integer number (1073808008).

Almost surely, 2^3221424021 is an apocalyptic number.

It is an amenable number.

3221424021 is a deficient number, since it is larger than the sum of its proper divisors (1073808011).

3221424021 is a wasteful number, since it uses less digits than its factorization.

3221424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073808010.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3221424021 is about 56757.5899858336. The cubic root of 3221424021 is about 1476.8939028732.

Adding to 3221424021 its reverse (1204241223), we get a palindrome (4425665244).

The spelling of 3221424021 in words is "three billion, two hundred twenty-one million, four hundred twenty-four thousand, twenty-one".