111110120081 has 2 divisors, whose sum is σ = 111110120082. Its totient is φ = 111110120080.

The previous prime is 111110120071. The next prime is 111110120129. The reversal of 111110120081 is 180021011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57619681681 + 53490438400 = 240041^2 + 231280^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110120081 - 2²⁶ = 111043011217 is a prime.

It is a super-2 number, since 2×111110120081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111110120041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555060040 + 55555060041.

It is an arithmetic number, because the mean of its divisors is an integer number (55555060041).

Almost surely, 2^111110120081 is an apocalyptic number.

It is an amenable number.

111110120081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110120081 is an equidigital number, since it uses as much as digits as its factorization.

111110120081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111110120081 its reverse (180021011111), we get a palindrome (291131131192).

The spelling of 111110120081 in words is "one hundred eleven billion, one hundred ten million, one hundred twenty thousand, eighty-one".