115217121 has 24 divisors (see below), whose sum is σ = 163275264. Its totient is φ = 72257760.

The previous prime is 115217107. The next prime is 115217131. The reversal of 115217121 is 121712511.

It is not a de Polignac number, because 115217121 - 2⁶ = 115217057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115217131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206575 + ... + 207131.

It is an arithmetic number, because the mean of its divisors is an integer number (6803136).

Almost surely, 2^115217121 is an apocalyptic number.

It is an amenable number.

115217121 is a deficient number, since it is larger than the sum of its proper divisors (48058143).

115217121 is a wasteful number, since it uses less digits than its factorization.

115217121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 770 counting only the distinct ones).

The product of its digits is 140, while the sum is 21.

The square root of 115217121 is about 10733.9238398640. The cubic root of 115217121 is about 486.6002634010.

Adding to 115217121 its reverse (121712511), we get a palindrome (236929632).

The spelling of 115217121 in words is "one hundred fifteen million, two hundred seventeen thousand, one hundred twenty-one".