115121215320 has 256 divisors, whose sum is σ = 373795430400. Its totient is φ = 28300554240.

The previous prime is 115121215303. The next prime is 115121215343. The reversal of 115121215320 is 23512121511.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6697377 + ... + 6714543.

It is an arithmetic number, because the mean of its divisors is an integer number (1460138400).

Almost surely, 2^115121215320 is an apocalyptic number.

115121215320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115121215320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186897715200).

115121215320 is an abundant number, since it is smaller than the sum of its proper divisors (258674215080).

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

115121215320 is a wasteful number, since it uses less digits than its factorization.

115121215320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17298 (or 17294 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 115121215320 its reverse (23512121511), we get a palindrome (138633336831).

The spelling of 115121215320 in words is "one hundred fifteen billion, one hundred twenty-one million, two hundred fifteen thousand, three hundred twenty".