3221001021 has 16 divisors (see below), whose sum is σ = 4909580928. Its totient is φ = 1840051200.

The previous prime is 3221001013. The next prime is 3221001031. The reversal of 3221001021 is 1201001223.

It is not a de Polignac number, because 3221001021 - 2³ = 3221001013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3221000988 and 3221001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221001031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61741 + ... + 101261.

It is an arithmetic number, because the mean of its divisors is an integer number (306848808).

Almost surely, 2^3221001021 is an apocalyptic number.

It is an amenable number.

3221001021 is a deficient number, since it is larger than the sum of its proper divisors (1688579907).

3221001021 is a wasteful number, since it uses less digits than its factorization.

3221001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43412.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 3221001021 is about 56753.8634896339. The cubic root of 3221001021 is about 1476.8292571903.

Adding to 3221001021 its reverse (1201001223), we get a palindrome (4422002244).

The spelling of 3221001021 in words is "three billion, two hundred twenty-one million, one thousand, twenty-one".