112861721017 has 2 divisors, whose sum is σ = 112861721018. Its totient is φ = 112861721016.

The previous prime is 112861720999. The next prime is 112861721053. The reversal of 112861721017 is 710127168211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111064893696 + 1796827321 = 333264^2 + 42389^2 .

It is a cyclic number.

It is not a de Polignac number, because 112861721017 - 2¹⁹ = 112861196729 is a prime.

It is not a weakly prime, because it can be changed into another prime (112861721057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56430860508 + 56430860509.

It is an arithmetic number, because the mean of its divisors is an integer number (56430860509).

Almost surely, 2^112861721017 is an apocalyptic number.

It is an amenable number.

112861721017 is a deficient number, since it is larger than the sum of its proper divisors (1).

112861721017 is an equidigital number, since it uses as much as digits as its factorization.

112861721017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 37.

Adding to 112861721017 its reverse (710127168211), we get a palindrome (822988889228).

The spelling of 112861721017 in words is "one hundred twelve billion, eight hundred sixty-one million, seven hundred twenty-one thousand, seventeen".