7115121385 has 16 divisors (see below), whose sum is σ = 8572213440. Its totient is φ = 5669421120.

The previous prime is 7115121361. The next prime is 7115121437. The reversal of 7115121385 is 5831215117.

7115121385 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7115121385 - 2⁷ = 7115121257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7115121385.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3264226 + ... + 3266404.

It is an arithmetic number, because the mean of its divisors is an integer number (535763340).

Almost surely, 2^7115121385 is an apocalyptic number.

It is an amenable number.

7115121385 is a deficient number, since it is larger than the sum of its proper divisors (1457092055).

7115121385 is a wasteful number, since it uses less digits than its factorization.

7115121385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488.

The product of its digits is 8400, while the sum is 34.

The square root of 7115121385 is about 84351.1789188509. The cubic root of 7115121385 is about 1923.3608476317.

The spelling of 7115121385 in words is "seven billion, one hundred fifteen million, one hundred twenty-one thousand, three hundred eighty-five".