3213001221 has 4 divisors (see below), whose sum is σ = 4284001632. Its totient is φ = 2142000812.

The previous prime is 3213001201. The next prime is 3213001223. The reversal of 3213001221 is 1221003123.

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 a cyclic number.

It is not a de Polignac number, because 3213001221 - 2⁵ = 3213001189 is a prime.

It is a super-2 number, since 2×3213001221² = 20646753692294981682, 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 3213001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213001223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535500201 + ... + 535500206.

It is an arithmetic number, because the mean of its divisors is an integer number (1071000408).

Almost surely, 2^3213001221 is an apocalyptic number.

It is an amenable number.

3213001221 is a deficient number, since it is larger than the sum of its proper divisors (1071000411).

3213001221 is a wasteful number, since it uses less digits than its factorization.

3213001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071000410.

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

The square root of 3213001221 is about 56683.3416534347. The cubic root of 3213001221 is about 1475.6056072568.

Adding to 3213001221 its reverse (1221003123), we get a palindrome (4434004344).

The spelling of 3213001221 in words is "three billion, two hundred thirteen million, one thousand, two hundred twenty-one".