3201213221 has 4 divisors (see below), whose sum is σ = 3217800012. Its totient is φ = 3184626432.

The previous prime is 3201213199. The next prime is 3201213263. The reversal of 3201213221 is 1223121023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223121023 = 29 ⋅42176587.

It can be written as a sum of positive squares in 2 ways, for example, as 1340584996 + 1860628225 = 36614^2 + 43135^2 .

It is a cyclic number.

It is not a de Polignac number, because 3201213221 - 2¹⁸ = 3200951077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3201213221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3201213121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8293106 + ... + 8293491.

It is an arithmetic number, because the mean of its divisors is an integer number (804450003).

Almost surely, 2^3201213221 is an apocalyptic number.

It is an amenable number.

3201213221 is a deficient number, since it is larger than the sum of its proper divisors (16586791).

3201213221 is a wasteful number, since it uses less digits than its factorization.

3201213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16586790.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3201213221 is about 56579.2649386681. The cubic root of 3201213221 is about 1473.7988069415.

Adding to 3201213221 its reverse (1223121023), we get a palindrome (4424334244).

The spelling of 3201213221 in words is "three billion, two hundred one million, two hundred thirteen thousand, two hundred twenty-one".