320212105 has 4 divisors (see below), whose sum is σ = 384254532. Its totient is φ = 256169680.

The previous prime is 320212103. The next prime is 320212127. The reversal of 320212105 is 501212023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501212023 = 13 ⋅38554771.

It can be written as a sum of positive squares in 2 ways, for example, as 82065481 + 238146624 = 9059^2 + 15432^2 .

It is not a de Polignac number, because 320212105 - 2¹ = 320212103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32021206 + ... + 32021215.

It is an arithmetic number, because the mean of its divisors is an integer number (96063633).

Almost surely, 2^320212105 is an apocalyptic number.

It is an amenable number.

320212105 is a deficient number, since it is larger than the sum of its proper divisors (64042427).

320212105 is an equidigital number, since it uses as much as digits as its factorization.

320212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64042426.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 320212105 is about 17894.4713529067. The cubic root of 320212105 is about 684.1414679803.

Adding to 320212105 its reverse (501212023), we get a palindrome (821424128).

The spelling of 320212105 in words is "three hundred twenty million, two hundred twelve thousand, one hundred five".