320021109 has 12 divisors (see below), whose sum is σ = 464926956. Its totient is φ = 212113152.

The previous prime is 320021101. The next prime is 320021131. The reversal of 320021109 is 901120023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 183060900 + 136960209 = 13530^2 + 11703^2 .

It is not a de Polignac number, because 320021109 - 2³ = 320021101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320021091 and 320021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101212 + ... + 104325.

It is an arithmetic number, because the mean of its divisors is an integer number (38743913).

Almost surely, 2^320021109 is an apocalyptic number.

It is an amenable number.

320021109 is a deficient number, since it is larger than the sum of its proper divisors (144905847).

320021109 is a wasteful number, since it uses less digits than its factorization.

320021109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205716 (or 205713 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 320021109 is about 17889.1338247552. The cubic root of 320021109 is about 684.0054182909.

The spelling of 320021109 in words is "three hundred twenty million, twenty-one thousand, one hundred nine".