108120866121 has 32 divisors (see below), whose sum is σ = 164091333120. Its totient is φ = 70323885072.

The previous prime is 108120866069. The next prime is 108120866131. The reversal of 108120866121 is 121668021801.

108120866121 is a `hidden beast` number, since 10 + 8 + 1 + 20 + 8 + 6 + 612 + 1 = 666.

It is not a de Polignac number, because 108120866121 - 2⁶ = 108120866057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108120866131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 972430 + ... + 1077896.

It is an arithmetic number, because the mean of its divisors is an integer number (5127854160).

Almost surely, 2^108120866121 is an apocalyptic number.

It is an amenable number.

108120866121 is a deficient number, since it is larger than the sum of its proper divisors (55970466999).

108120866121 is a wasteful number, since it uses less digits than its factorization.

108120866121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106402 (or 106396 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

Adding to 108120866121 its reverse (121668021801), we get a palindrome (229788887922).

The spelling of 108120866121 in words is "one hundred eight billion, one hundred twenty million, eight hundred sixty-six thousand, one hundred twenty-one".