321320105 has 4 divisors (see below), whose sum is σ = 385584132. Its totient is φ = 257056080.

The previous prime is 321320081. The next prime is 321320113. The reversal of 321320105 is 501023123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501023123 = 2371 ⋅211313.

It can be written as a sum of positive squares in 2 ways, for example, as 191656336 + 129663769 = 13844^2 + 11387^2 .

It is not a de Polignac number, because 321320105 - 2¹⁰ = 321319081 is a prime.

It is a super-2 number, since 2×321320105² = 206493219754422050, which contains 22 as substring.

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, 32132006 + ... + 32132015.

It is an arithmetic number, because the mean of its divisors is an integer number (96396033).

Almost surely, 2^321320105 is an apocalyptic number.

It is an amenable number.

321320105 is a deficient number, since it is larger than the sum of its proper divisors (64264027).

321320105 is an equidigital number, since it uses as much as digits as its factorization.

321320105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64264026.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 321320105 is about 17925.4039006099. The cubic root of 321320105 is about 684.9296498338.

Adding to 321320105 its reverse (501023123), we get a palindrome (822343228).

The spelling of 321320105 in words is "three hundred twenty-one million, three hundred twenty thousand, one hundred five".