320421011 has 2 divisors, whose sum is σ = 320421012. Its totient is φ = 320421010.

The previous prime is 320421007. The next prime is 320421019. The reversal of 320421011 is 110124023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320421011 - 2² = 320421007 is a prime.

It is not a weakly prime, because it can be changed into another prime (320421019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160210505 + 160210506.

It is an arithmetic number, because the mean of its divisors is an integer number (160210506).

Almost surely, 2^320421011 is an apocalyptic number.

320421011 is a deficient number, since it is larger than the sum of its proper divisors (1).

320421011 is an equidigital number, since it uses as much as digits as its factorization.

320421011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 320421011 is about 17900.3075671900. The cubic root of 320421011 is about 684.2902133337.

Adding to 320421011 its reverse (110124023), we get a palindrome (430545034).

The spelling of 320421011 in words is "three hundred twenty million, four hundred twenty-one thousand, eleven".