3221721040021 has 8 divisors (see below), whose sum is σ = 3667413674304. Its totient is φ = 2801496556320.

The previous prime is 3221721040007. The next prime is 3221721040079. The reversal of 3221721040021 is 1200401271223.

3221721040021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3221721040021 - 2⁷ = 3221721039893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221721040621) 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, 6367037376 + ... + 6367037881.

It is an arithmetic number, because the mean of its divisors is an integer number (458426709288).

Almost surely, 2^{3221721040021} is an apocalyptic number.

It is an amenable number.

3221721040021 is a deficient number, since it is larger than the sum of its proper divisors (445692634283).

3221721040021 is a wasteful number, since it uses less digits than its factorization.

3221721040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12734075291.

The product of its (nonzero) digits is 1344, while the sum is 25.

The spelling of 3221721040021 in words is "three trillion, two hundred twenty-one billion, seven hundred twenty-one million, forty thousand, twenty-one".