115511512120 has 32 divisors (see below), whose sum is σ = 266925254400. Its totient is φ = 44955831168.

The previous prime is 115511512099. The next prime is 115511512153. The reversal of 115511512120 is 21215115511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39022680 + ... + 39025639.

It is an arithmetic number, because the mean of its divisors is an integer number (8341414200).

Almost surely, 2^115511512120 is an apocalyptic number.

115511512120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115511512120 is an abundant number, since it is smaller than the sum of its proper divisors (151413742280).

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

115511512120 is a wasteful number, since it uses less digits than its factorization.

115511512120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78048367 (or 78048363 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 25.

Adding to 115511512120 its reverse (21215115511), we get a palindrome (136726627631).

The spelling of 115511512120 in words is "one hundred fifteen billion, five hundred eleven million, five hundred twelve thousand, one hundred twenty".