1021320353 has 2 divisors, whose sum is σ = 1021320354. Its totient is φ = 1021320352.

The previous prime is 1021320331. The next prime is 1021320379. The reversal of 1021320353 is 3530231201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901921024 + 119399329 = 30032^2 + 10927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021320353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021320253) 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 as a sum of consecutive naturals, namely, 510660176 + 510660177.

It is an arithmetic number, because the mean of its divisors is an integer number (510660177).

Almost surely, 2^1021320353 is an apocalyptic number.

It is an amenable number.

1021320353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021320353 is an equidigital number, since it uses as much as digits as its factorization.

1021320353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1021320353 is about 31958.1030882623. The cubic root of 1021320353 is about 1007.0568678075.

Adding to 1021320353 its reverse (3530231201), we get a palindrome (4551551554).

The spelling of 1021320353 in words is "one billion, twenty-one million, three hundred twenty thousand, three hundred fifty-three".