108136121 has 4 divisors (see below), whose sum is σ = 108386292. Its totient is φ = 107885952.

The previous prime is 108136111. The next prime is 108136123. The reversal of 108136121 is 121631801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59290000 + 48846121 = 7700^2 + 6989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108136121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108136123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124436 + ... + 125301.

It is an arithmetic number, because the mean of its divisors is an integer number (27096573).

Almost surely, 2^108136121 is an apocalyptic number.

It is an amenable number.

108136121 is a deficient number, since it is larger than the sum of its proper divisors (250171).

108136121 is an equidigital number, since it uses as much as digits as its factorization.

108136121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250170.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 108136121 is about 10398.8519077829. The cubic root of 108136121 is about 476.4203043884.

Adding to 108136121 its reverse (121631801), we get a palindrome (229767922).

The spelling of 108136121 in words is "one hundred eight million, one hundred thirty-six thousand, one hundred twenty-one".