3121032020209 has 4 divisors (see below), whose sum is σ = 3136715598400. Its totient is φ = 3105348442020.

The previous prime is 3121032020177. The next prime is 3121032020219. The reversal of 3121032020209 is 9020202301213.

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 3121032020209 - 2⁵ = 3121032020177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121032020219) 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 3 ways as a sum of consecutive naturals, for example, 7841788797 + ... + 7841789194.

It is an arithmetic number, because the mean of its divisors is an integer number (784178899600).

Almost surely, 2^{3121032020209} is an apocalyptic number.

It is an amenable number.

3121032020209 is a deficient number, since it is larger than the sum of its proper divisors (15683578191).

3121032020209 is a wasteful number, since it uses less digits than its factorization.

3121032020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15683578190.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 3121032020209 in words is "three trillion, one hundred twenty-one billion, thirty-two million, twenty thousand, two hundred nine".