3201221009 has 12 divisors (see below), whose sum is σ = 3738043584. Its totient is φ = 2733459624.

The previous prime is 3201220987. The next prime is 3201221011. The reversal of 3201221009 is 9001221023.

It is not a de Polignac number, because 3201221009 - 2¹² = 3201216913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3201221069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111317 + ... + 137090.

It is an arithmetic number, because the mean of its divisors is an integer number (311503632).

Almost surely, 2^3201221009 is an apocalyptic number.

It is an amenable number.

3201221009 is a deficient number, since it is larger than the sum of its proper divisors (536822575).

3201221009 is a wasteful number, since it uses less digits than its factorization.

3201221009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248684 (or 248677 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 3201221009 is about 56579.3337624260. Note that the first 3 decimals coincide. The cubic root of 3201221009 is about 1473.8000021067.

The spelling of 3201221009 in words is "three billion, two hundred one million, two hundred twenty-one thousand, nine".