3321001221 has 16 divisors (see below), whose sum is σ = 4696501824. Its totient is φ = 2080196864.

The previous prime is 3321001219. The next prime is 3321001259. The reversal of 3321001221 is 1221001233.

3321001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3321001221 - 2¹ = 3321001219 is a prime.

It is a super-2 number, since 2×3321001221² = 22058098219766981682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3321001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3321001291) 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, 25530 + ... + 85403.

It is an arithmetic number, because the mean of its divisors is an integer number (293531364).

Almost surely, 2^3321001221 is an apocalyptic number.

It is an amenable number.

3321001221 is a deficient number, since it is larger than the sum of its proper divisors (1375500603).

3321001221 is a wasteful number, since it uses less digits than its factorization.

3321001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111540.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3321001221 is about 57628.1287306815. The cubic root of 3321001221 is about 1491.9571328250.

Adding to 3321001221 its reverse (1221001233), we get a palindrome (4542002454).

The spelling of 3321001221 in words is "three billion, three hundred twenty-one million, one thousand, two hundred twenty-one".