112211681 has 2 divisors, whose sum is σ = 112211682. Its totient is φ = 112211680.

The previous prime is 112211677. The next prime is 112211683. The reversal of 112211681 is 186112211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96845281 + 15366400 = 9841^2 + 3920^2 .

It is an emirp because it is prime and its reverse (186112211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112211681 - 2² = 112211677 is a prime.

It is a super-2 number, since 2×112211681² = 25182922705691522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 112211683, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (112211683) 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, 56105840 + 56105841.

It is an arithmetic number, because the mean of its divisors is an integer number (56105841).

Almost surely, 2^112211681 is an apocalyptic number.

It is an amenable number.

112211681 is a deficient number, since it is larger than the sum of its proper divisors (1).

112211681 is an equidigital number, since it uses as much as digits as its factorization.

112211681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 23.

The square root of 112211681 is about 10593.0015104313. The cubic root of 112211681 is about 482.3319410767.

Adding to 112211681 its reverse (186112211), we get a palindrome (298323892).

The spelling of 112211681 in words is "one hundred twelve million, two hundred eleven thousand, six hundred eighty-one".