7115121388 has 24 divisors (see below), whose sum is σ = 12568787280. Its totient is φ = 3524075520.

The previous prime is 7115121361. The next prime is 7115121437. The reversal of 7115121388 is 8831215117.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 1086508 + ... + 1093036.

It is an arithmetic number, because the mean of its divisors is an integer number (523699470).

Almost surely, 2^7115121388 is an apocalyptic number.

It is an amenable number.

7115121388 is a deficient number, since it is larger than the sum of its proper divisors (5453665892).

7115121388 is a wasteful number, since it uses less digits than its factorization.

7115121388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9057 (or 9055 counting only the distinct ones).

The product of its digits is 13440, while the sum is 37.

The square root of 7115121388 is about 84351.1789366337. The cubic root of 7115121388 is about 1923.3608479020.

The spelling of 7115121388 in words is "seven billion, one hundred fifteen million, one hundred twenty-one thousand, three hundred eighty-eight".