100001011111 has 4 divisors (see below), whose sum is σ = 100004621112. Its totient is φ = 99997401112.

The previous prime is 100001011093. The next prime is 100001011129. The reversal of 100001011111 is 111110100001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111110100001 = 4567 ⋅24328903.

It is an interprime number because it is at equal distance from previous prime (100001011093) and next prime (100001011129).

It is a cyclic number.

It is not a de Polignac number, because 100001011111 - 2⁵ = 100001011079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001011094 and 100001011103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001011181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1763125 + ... + 1818958.

It is an arithmetic number, because the mean of its divisors is an integer number (25001155278).

Almost surely, 2^100001011111 is an apocalyptic number.

100001011111 is a deficient number, since it is larger than the sum of its proper divisors (3610001).

100001011111 is an equidigital number, since it uses as much as digits as its factorization.

100001011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610000.

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 100001011111 its reverse (111110100001), we get a palindrome (211111111112).

The spelling of 100001011111 in words is "one hundred billion, one million, eleven thousand, one hundred eleven".