100780111 has 2 divisors, whose sum is σ = 100780112. Its totient is φ = 100780110.

The previous prime is 100780093. The next prime is 100780117. The reversal of 100780111 is 111087001.

It is a strong prime.

It is an emirp because it is prime and its reverse (111087001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100780111 - 2¹⁷ = 100649039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100780117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50390055 + 50390056.

It is an arithmetic number, because the mean of its divisors is an integer number (50390056).

Almost surely, 2^100780111 is an apocalyptic number.

100780111 is a deficient number, since it is larger than the sum of its proper divisors (1).

100780111 is an equidigital number, since it uses as much as digits as its factorization.

100780111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

The square root of 100780111 is about 10038.9297736362. The cubic root of 100780111 is about 465.3627431219.

It can be divided in two parts, 1007 and 80111, that added together give a palindrome (81118).

The spelling of 100780111 in words is "one hundred million, seven hundred eighty thousand, one hundred eleven".