2161005101 has 2 divisors, whose sum is σ = 2161005102. Its totient is φ = 2161005100.

The previous prime is 2161005083. The next prime is 2161005127. The reversal of 2161005101 is 1015001612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2143782601 + 17222500 = 46301^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2161005101 - 2⁶ = 2161005037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2161005101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161005131) 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, 1080502550 + 1080502551.

It is an arithmetic number, because the mean of its divisors is an integer number (1080502551).

Almost surely, 2^2161005101 is an apocalyptic number.

It is an amenable number.

2161005101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161005101 is an equidigital number, since it uses as much as digits as its factorization.

2161005101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 2161005101 is about 46486.6120619690. The cubic root of 2161005101 is about 1292.8612851926.

Adding to 2161005101 its reverse (1015001612), we get a palindrome (3176006713).

The spelling of 2161005101 in words is "two billion, one hundred sixty-one million, five thousand, one hundred one".