115121216 has 28 divisors (see below), whose sum is σ = 261079488. Its totient is φ = 49337472.

The previous prime is 115121207. The next prime is 115121221. The reversal of 115121216 is 612121511.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128036 + ... + 128931.

Almost surely, 2^115121216 is an apocalyptic number.

115121216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

115121216 is an abundant number, since it is smaller than the sum of its proper divisors (145958272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115121216 is an equidigital number, since it uses as much as digits as its factorization.

115121216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256986 (or 256976 counting only the distinct ones).

The product of its digits is 120, while the sum is 20.

The square root of 115121216 is about 10729.4555313865. The cubic root of 115121216 is about 486.4652130072.

Adding to 115121216 its reverse (612121511), we get a palindrome (727242727).

The spelling of 115121216 in words is "one hundred fifteen million, one hundred twenty-one thousand, two hundred sixteen".