111111100001087 has 2 divisors, whose sum is σ = 111111100001088. Its totient is φ = 111111100001086.

The previous prime is 111111100001063. The next prime is 111111100001123. The reversal of 111111100001087 is 780100001111111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111111100001087 - 2⁶ = 111111100001023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111100001287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555550000543 + 55555550000544.

It is an arithmetic number, because the mean of its divisors is an integer number (55555550000544).

Almost surely, 2^{111111100001087} is an apocalyptic number.

111111100001087 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111100001087 is an equidigital number, since it uses as much as digits as its factorization.

111111100001087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 23.

Adding to 111111100001087 its reverse (780100001111111), we get a palindrome (891211101112198).

The spelling of 111111100001087 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, one thousand, eighty-seven".