320021011 has 8 divisors (see below), whose sum is σ = 338920704. Its totient is φ = 301536840.

The previous prime is 320020999. The next prime is 320021017. The reversal of 320021011 is 110120023.

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 320021011 - 2⁹ = 320020499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320021017) 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 7 ways as a sum of consecutive naturals, for example, 102295 + ... + 105376.

It is an arithmetic number, because the mean of its divisors is an integer number (42365088).

Almost surely, 2^320021011 is an apocalyptic number.

320021011 is a deficient number, since it is larger than the sum of its proper divisors (18899693).

320021011 is a wasteful number, since it uses less digits than its factorization.

320021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207761.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 320021011 is about 17889.1310856620. The cubic root of 320021011 is about 684.0053484700.

Adding to 320021011 its reverse (110120023), we get a palindrome (430141034).

The spelling of 320021011 in words is "three hundred twenty million, twenty-one thousand, eleven".