1322220161 has 2 divisors, whose sum is σ = 1322220162. Its totient is φ = 1322220160.

The previous prime is 1322220157. The next prime is 1322220173. The reversal of 1322220161 is 1610222231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1298881600 + 23338561 = 36040^2 + 4831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322220161 - 2² = 1322220157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1322220131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661110080 + 661110081.

It is an arithmetic number, because the mean of its divisors is an integer number (661110081).

Almost surely, 2^1322220161 is an apocalyptic number.

It is an amenable number.

1322220161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322220161 is an equidigital number, since it uses as much as digits as its factorization.

1322220161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1322220161 is about 36362.3453726516. The cubic root of 1322220161 is about 1097.5759737639.

Adding to 1322220161 its reverse (1610222231), we get a palindrome (2932442392).

The spelling of 1322220161 in words is "one billion, three hundred twenty-two million, two hundred twenty thousand, one hundred sixty-one".