108212105 has 4 divisors (see below), whose sum is σ = 129854532. Its totient is φ = 86569680.

The previous prime is 108212099. The next prime is 108212113. The reversal of 108212105 is 501212801.

It is a happy number.

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 58537801 + 49674304 = 7651^2 + 7048^2 .

It is not a de Polignac number, because 108212105 - 2²² = 104017801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10821206 + ... + 10821215.

It is an arithmetic number, because the mean of its divisors is an integer number (32463633).

Almost surely, 2^108212105 is an apocalyptic number.

It is an amenable number.

108212105 is a deficient number, since it is larger than the sum of its proper divisors (21642427).

108212105 is an equidigital number, since it uses as much as digits as its factorization.

108212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21642426.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 108212105 is about 10402.5047464541. The cubic root of 108212105 is about 476.5318670017.

Adding to 108212105 its reverse (501212801), we get a palindrome (609424906).

The spelling of 108212105 in words is "one hundred eight million, two hundred twelve thousand, one hundred five".