2120108905 has 8 divisors (see below), whose sum is σ = 2544753600. Its totient is φ = 1695671856.

The previous prime is 2120108867. The next prime is 2120108909. The reversal of 2120108905 is 5098010212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2120108905 - 2¹⁷ = 2119977833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120108909) 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 7 ways as a sum of consecutive naturals, for example, 28485 + ... + 71074.

It is an arithmetic number, because the mean of its divisors is an integer number (318094200).

Almost surely, 2^2120108905 is an apocalyptic number.

It is an amenable number.

2120108905 is a deficient number, since it is larger than the sum of its proper divisors (424644695).

2120108905 is an equidigital number, since it uses as much as digits as its factorization.

2120108905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103823.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 2120108905 is about 46044.6403504252. The cubic root of 2120108905 is about 1284.6536546331.

The spelling of 2120108905 in words is "two billion, one hundred twenty million, one hundred eight thousand, nine hundred five".