111111001100881 has 2 divisors, whose sum is σ = 111111001100882. Its totient is φ = 111111001100880.

The previous prime is 111111001100839. The next prime is 111111001100899. The reversal of 111111001100881 is 188001100111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92770415427600 + 18340585673281 = 9631740^2 + 4282591^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111001100881 - 2¹¹ = 111111001098833 is a prime.

It is a super-2 number, since 2×111111001100881² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111111041100881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555500550440 + 55555500550441.

It is an arithmetic number, because the mean of its divisors is an integer number (55555500550441).

Almost surely, 2^{111111001100881} is an apocalyptic number.

It is an amenable number.

111111001100881 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111001100881 is an equidigital number, since it uses as much as digits as its factorization.

111111001100881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 25.

Adding to 111111001100881 its reverse (188001100111111), we get a palindrome (299112101211992).

The spelling of 111111001100881 in words is "one hundred eleven trillion, one hundred eleven billion, one million, one hundred thousand, eight hundred eighty-one".