322040021 has 2 divisors, whose sum is σ = 322040022. Its totient is φ = 322040020.

The previous prime is 322039981. The next prime is 322040039. The reversal of 322040021 is 120040223.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242580625 + 79459396 = 15575^2 + 8914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-322040021 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 322039978 and 322040005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (322040071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161020010 + 161020011.

It is an arithmetic number, because the mean of its divisors is an integer number (161020011).

Almost surely, 2^322040021 is an apocalyptic number.

It is an amenable number.

322040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

322040021 is an equidigital number, since it uses as much as digits as its factorization.

322040021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 322040021 is about 17945.4735518459. The cubic root of 322040021 is about 685.4407953730.

Adding to 322040021 its reverse (120040223), we get a palindrome (442080244).

The spelling of 322040021 in words is "three hundred twenty-two million, forty thousand, twenty-one".