7115121397 has 4 divisors (see below), whose sum is σ = 7115718636. Its totient is φ = 7114524160.

The previous prime is 7115121361. The next prime is 7115121437. The reversal of 7115121397 is 7931215117.

7115121397 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3770696836 + 3344424561 = 61406^2 + 57831^2 .

It is a cyclic number.

It is not a de Polignac number, because 7115121397 - 2⁷ = 7115121269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7115101397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280378 + ... + 304699.

It is an arithmetic number, because the mean of its divisors is an integer number (1778929659).

Almost surely, 2^7115121397 is an apocalyptic number.

It is an amenable number.

7115121397 is a deficient number, since it is larger than the sum of its proper divisors (597239).

7115121397 is a wasteful number, since it uses less digits than its factorization.

7115121397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597238.

The product of its digits is 13230, while the sum is 37.

The square root of 7115121397 is about 84351.1789899821. The cubic root of 7115121397 is about 1923.3608487130.

The spelling of 7115121397 in words is "seven billion, one hundred fifteen million, one hundred twenty-one thousand, three hundred ninety-seven".