100111121181 has 32 divisors (see below), whose sum is σ = 150865344000. Its totient is φ = 65593851840.

The previous prime is 100111121179. The next prime is 100111121191. The reversal of 100111121181 is 181121111001.

It is not a de Polignac number, because 100111121181 - 2¹ = 100111121179 is a prime.

It is a super-2 number, since 2×100111121181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111121191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2079420 + ... + 2127018.

It is an arithmetic number, because the mean of its divisors is an integer number (4714542000).

Almost surely, 2^100111121181 is an apocalyptic number.

It is an amenable number.

100111121181 is a deficient number, since it is larger than the sum of its proper divisors (50754222819).

100111121181 is a wasteful number, since it uses less digits than its factorization.

100111121181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48946 (or 48940 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 100111121181 its reverse (181121111001), we get a palindrome (281232232182).

The spelling of 100111121181 in words is "one hundred billion, one hundred eleven million, one hundred twenty-one thousand, one hundred eighty-one".