6871328121 has 32 divisors (see below), whose sum is σ = 10851978240. Its totient is φ = 3783963456.

The previous prime is 6871328119. The next prime is 6871328143. The reversal of 6871328121 is 1218231786.

It is not a de Polignac number, because 6871328121 - 2¹ = 6871328119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6871328121.

It is not an unprimeable number, because it can be changed into a prime (6871328161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322810 + ... + 343436.

It is an arithmetic number, because the mean of its divisors is an integer number (339124320).

Almost surely, 2^6871328121 is an apocalyptic number.

It is an amenable number.

6871328121 is a deficient number, since it is larger than the sum of its proper divisors (3980650119).

6871328121 is a wasteful number, since it uses less digits than its factorization.

6871328121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21213.

The product of its digits is 32256, while the sum is 39.

The square root of 6871328121 is about 82893.4745381082. The cubic root of 6871328121 is about 1901.1376493375.

The spelling of 6871328121 in words is "six billion, eight hundred seventy-one million, three hundred twenty-eight thousand, one hundred twenty-one".