100111010978 has 32 divisors (see below), whose sum is σ = 169165782720. Its totient is φ = 44038935360.

The previous prime is 100111010977. The next prime is 100111011031. The reversal of 100111010978 is 879010111001.

It is a self number, because there is not a number n which added to its sum of digits gives 100111010978.

It is not an unprimeable number, because it can be changed into a prime (100111010977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382325 + ... + 588552.

It is an arithmetic number, because the mean of its divisors is an integer number (5286430710).

Almost surely, 2^100111010978 is an apocalyptic number.

100111010978 is a deficient number, since it is larger than the sum of its proper divisors (69054771742).

100111010978 is a wasteful number, since it uses less digits than its factorization.

100111010978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971042.

The product of its (nonzero) digits is 504, while the sum is 29.

Adding to 100111010978 its reverse (879010111001), we get a palindrome (979121121979).

The spelling of 100111010978 in words is "one hundred billion, one hundred eleven million, ten thousand, nine hundred seventy-eight".