100005511111 has 4 divisors (see below), whose sum is σ = 109096921224. Its totient is φ = 90914101000.

The previous prime is 100005511093. The next prime is 100005511153. The reversal of 100005511111 is 111115500001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100005511111 - 2¹¹ = 100005509063 is a prime.

It is a super-2 number, since 2×100005511111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100005511171) 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 in 3 ways as a sum of consecutive naturals, for example, 4545705040 + ... + 4545705061.

It is an arithmetic number, because the mean of its divisors is an integer number (27274230306).

Almost surely, 2^100005511111 is an apocalyptic number.

100005511111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100005511111 is a deficient number, since it is larger than the sum of its proper divisors (9091410113).

100005511111 is an equidigital number, since it uses as much as digits as its factorization.

100005511111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9091410112.

The product of its (nonzero) digits is 25, while the sum is 16.

It can be divided in two parts, 100005 and 511111, that added together give a palindrome (611116).

The spelling of 100005511111 in words is "one hundred billion, five million, five hundred eleven thousand, one hundred eleven".