115515106121 has 4 divisors (see below), whose sum is σ = 115923286992. Its totient is φ = 115106925252.

The previous prime is 115515106081. The next prime is 115515106127. The reversal of 115515106121 is 121601515511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115515106121 - 2¹⁴ = 115515089737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115515106127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 204090011 + ... + 204090576.

It is an arithmetic number, because the mean of its divisors is an integer number (28980821748).

Almost surely, 2^115515106121 is an apocalyptic number.

It is an amenable number.

115515106121 is a deficient number, since it is larger than the sum of its proper divisors (408180871).

115515106121 is an equidigital number, since it uses as much as digits as its factorization.

115515106121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408180870.

The product of its (nonzero) digits is 1500, while the sum is 29.

The spelling of 115515106121 in words is "one hundred fifteen billion, five hundred fifteen million, one hundred six thousand, one hundred twenty-one".