100111121178 has 16 divisors (see below), whose sum is σ = 202756702080. Its totient is φ = 32947963776.

The previous prime is 100111121167. The next prime is 100111121179. The reversal of 100111121178 is 871121111001.

It is not an unprimeable number, because it can be changed into a prime (100111121179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105601975 + ... + 105602922.

It is an arithmetic number, because the mean of its divisors is an integer number (12672293880).

Almost surely, 2^100111121178 is an apocalyptic number.

100111121178 is an abundant number, since it is smaller than the sum of its proper divisors (102645580902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100111121178 is a wasteful number, since it uses less digits than its factorization.

100111121178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211204981.

The product of its (nonzero) digits is 112, while the sum is 24.

Adding to 100111121178 its reverse (871121111001), we get a palindrome (971232232179).

The spelling of 100111121178 in words is "one hundred billion, one hundred eleven million, one hundred twenty-one thousand, one hundred seventy-eight".