112161720511 has 2 divisors, whose sum is σ = 112161720512. Its totient is φ = 112161720510.

The previous prime is 112161720497. The next prime is 112161720533. The reversal of 112161720511 is 115027161211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 112161720511 - 2¹⁹ = 112161196223 is a prime.

It is a super-2 number, since 2×112161720511² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 112161720511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112161720311) 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, 56080860255 + 56080860256.

It is an arithmetic number, because the mean of its divisors is an integer number (56080860256).

Almost surely, 2^112161720511 is an apocalyptic number.

112161720511 is a deficient number, since it is larger than the sum of its proper divisors (1).

112161720511 is an equidigital number, since it uses as much as digits as its factorization.

112161720511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 28.

Adding to 112161720511 its reverse (115027161211), we get a palindrome (227188881722).

The spelling of 112161720511 in words is "one hundred twelve billion, one hundred sixty-one million, seven hundred twenty thousand, five hundred eleven".