3201021009 has 12 divisors (see below), whose sum is σ = 4627660752. Its totient is φ = 2132184600.

The previous prime is 3201020989. The next prime is 3201021037. The reversal of 3201021009 is 9001201023.

It is a happy number.

It is not a de Polignac number, because 3201021009 - 2¹² = 3201016913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3201020982 and 3201021000.

It is not an unprimeable number, because it can be changed into a prime (3201091009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141327 + ... + 162404.

It is an arithmetic number, because the mean of its divisors is an integer number (385638396).

Almost surely, 2^3201021009 is an apocalyptic number.

It is an amenable number.

3201021009 is a deficient number, since it is larger than the sum of its proper divisors (1426639743).

3201021009 is a wasteful number, since it uses less digits than its factorization.

3201021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304908 (or 304905 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 3201021009 is about 56577.5663050294. The cubic root of 3201021009 is about 1473.7693090120.

The spelling of 3201021009 in words is "three billion, two hundred one million, twenty-one thousand, nine".