115105721205 has 16 divisors (see below), whose sum is σ = 185133394944. Its totient is φ = 61068304320.

The previous prime is 115105721167. The next prime is 115105721249. The reversal of 115105721205 is 502127501511.

It is not a de Polignac number, because 115105721205 - 2¹³ = 115105713013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20085394 + ... + 20091123.

It is an arithmetic number, because the mean of its divisors is an integer number (11570837184).

Almost surely, 2^115105721205 is an apocalyptic number.

115105721205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115105721205 is a deficient number, since it is larger than the sum of its proper divisors (70027673739).

115105721205 is a wasteful number, since it uses less digits than its factorization.

115105721205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40176716.

The product of its (nonzero) digits is 3500, while the sum is 30.

The spelling of 115105721205 in words is "one hundred fifteen billion, one hundred five million, seven hundred twenty-one thousand, two hundred five".