1021332161 has 2 divisors, whose sum is σ = 1021332162. Its totient is φ = 1021332160.

The previous prime is 1021332149. The next prime is 1021332187. The reversal of 1021332161 is 1612331201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1020163600 + 1168561 = 31940^2 + 1081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021332161 - 2¹⁰ = 1021331137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021322161) 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, 510666080 + 510666081.

It is an arithmetic number, because the mean of its divisors is an integer number (510666081).

Almost surely, 2^1021332161 is an apocalyptic number.

It is an amenable number.

1021332161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021332161 is an equidigital number, since it uses as much as digits as its factorization.

1021332161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1021332161 is about 31958.2878296069. The cubic root of 1021332161 is about 1007.0607488235.

Adding to 1021332161 its reverse (1612331201), we get a palindrome (2633663362).

The spelling of 1021332161 in words is "one billion, twenty-one million, three hundred thirty-two thousand, one hundred sixty-one".