112801721 has 2 divisors, whose sum is σ = 112801722. Its totient is φ = 112801720.

The previous prime is 112801643. The next prime is 112801723. The reversal of 112801721 is 127108211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92371321 + 20430400 = 9611^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 112801721 - 2¹⁰ = 112800697 is a prime.

Together with 112801723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (112801723) 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, 56400860 + 56400861.

It is an arithmetic number, because the mean of its divisors is an integer number (56400861).

Almost surely, 2^112801721 is an apocalyptic number.

It is an amenable number.

112801721 is a deficient number, since it is larger than the sum of its proper divisors (1).

112801721 is an equidigital number, since it uses as much as digits as its factorization.

112801721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 112801721 is about 10620.8154583346. The cubic root of 112801721 is about 483.1758750934.

Adding to 112801721 its reverse (127108211), we get a palindrome (239909932).

The spelling of 112801721 in words is "one hundred twelve million, eight hundred one thousand, seven hundred twenty-one".