115205220011 has 8 divisors (see below), whose sum is σ = 134350111200. Its totient is φ = 98747331144.

The previous prime is 115205219957. The next prime is 115205220037. The reversal of 115205220011 is 110022502511.

It is not a de Polignac number, because 115205220011 - 2⁶ = 115205219947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115205220071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167937296 + ... + 167937981.

It is an arithmetic number, because the mean of its divisors is an integer number (16793763900).

Almost surely, 2^115205220011 is an apocalyptic number.

115205220011 is a deficient number, since it is larger than the sum of its proper divisors (19144891189).

115205220011 is an frugal number, since it uses more digits than its factorization.

115205220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335875298 (or 335875284 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 115205220011 its reverse (110022502511), we get a palindrome (225227722522).

The spelling of 115205220011 in words is "one hundred fifteen billion, two hundred five million, two hundred twenty thousand, eleven".