108609621121 has 4 divisors (see below), whose sum is σ = 112354780500. Its totient is φ = 104864461744.

The previous prime is 108609621119. The next prime is 108609621137. The reversal of 108609621121 is 121126906801.

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 59883473521 + 48726147600 = 244711^2 + 220740^2 .

It is a cyclic number.

It is not a de Polignac number, because 108609621121 - 2¹ = 108609621119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108609621101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872579646 + ... + 1872579703.

It is an arithmetic number, because the mean of its divisors is an integer number (28088695125).

Almost surely, 2^108609621121 is an apocalyptic number.

It is an amenable number.

108609621121 is a deficient number, since it is larger than the sum of its proper divisors (3745159379).

108609621121 is an equidigital number, since it uses as much as digits as its factorization.

108609621121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745159378.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 108609621121 in words is "one hundred eight billion, six hundred nine million, six hundred twenty-one thousand, one hundred twenty-one".