111012111230281 has 2 divisors, whose sum is σ = 111012111230282. Its totient is φ = 111012111230280.

The previous prime is 111012111230257. The next prime is 111012111230333. The reversal of 111012111230281 is 182032111210111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100822002312256 + 10190108918025 = 10041016^2 + 3192195^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012111230281 - 2⁹ = 111012111229769 is a prime.

It is a super-2 number, since 2×111012111230281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111012111230201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506055615140 + 55506055615141.

It is an arithmetic number, because the mean of its divisors is an integer number (55506055615141).

Almost surely, 2^{111012111230281} is an apocalyptic number.

It is an amenable number.

111012111230281 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012111230281 is an equidigital number, since it uses as much as digits as its factorization.

111012111230281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 25.

Adding to 111012111230281 its reverse (182032111210111), we get a palindrome (293044222440392).

The spelling of 111012111230281 in words is "one hundred eleven trillion, twelve billion, one hundred eleven million, two hundred thirty thousand, two hundred eighty-one".