1322231161 has 2 divisors, whose sum is σ = 1322231162. Its totient is φ = 1322231160.

The previous prime is 1322231159. The next prime is 1322231167. The reversal of 1322231161 is 1611322231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1317690000 + 4541161 = 36300^2 + 2131^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322231161 - 2¹ = 1322231159 is a prime.

Together with 1322231159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1322231167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661115580 + 661115581.

It is an arithmetic number, because the mean of its divisors is an integer number (661115581).

Almost surely, 2^1322231161 is an apocalyptic number.

It is an amenable number.

1322231161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322231161 is an equidigital number, since it uses as much as digits as its factorization.

1322231161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 1322231161 is about 36362.4966277070. The cubic root of 1322231161 is about 1097.5790174582.

Adding to 1322231161 its reverse (1611322231), we get a palindrome (2933553392).

The spelling of 1322231161 in words is "one billion, three hundred twenty-two million, two hundred thirty-one thousand, one hundred sixty-one".