2321121161 has 2 divisors, whose sum is σ = 2321121162. Its totient is φ = 2321121160.

The previous prime is 2321121119. The next prime is 2321121239. The reversal of 2321121161 is 1611211232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1918878025 + 402243136 = 43805^2 + 20056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2321121161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2321121661) 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, 1160560580 + 1160560581.

It is an arithmetic number, because the mean of its divisors is an integer number (1160560581).

Almost surely, 2^2321121161 is an apocalyptic number.

It is an amenable number.

2321121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321121161 is an equidigital number, since it uses as much as digits as its factorization.

2321121161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 2321121161 is about 48178.0153285708. The cubic root of 2321121161 is about 1324.0344047871.

Adding to 2321121161 its reverse (1611211232), we get a palindrome (3932332393).

The spelling of 2321121161 in words is "two billion, three hundred twenty-one million, one hundred twenty-one thousand, one hundred sixty-one".