111110111010978 has 8 divisors (see below), whose sum is σ = 222220222021968. Its totient is φ = 37036703670324.

The previous prime is 111110111010947. The next prime is 111110111010979. The reversal of 111110111010978 is 879010111011111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

111110111010978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (111110111010979) 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, 9259175917576 + ... + 9259175917587.

It is an arithmetic number, because the mean of its divisors is an integer number (27777527752746).

Almost surely, 2^{111110111010978} is an apocalyptic number.

111110111010978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111110111010978 is a wasteful number, since it uses less digits than its factorization.

111110111010978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18518351835168.

The product of its (nonzero) digits is 504, while the sum is 33.

The spelling of 111110111010978 in words is "one hundred eleven trillion, one hundred ten billion, one hundred eleven million, ten thousand, nine hundred seventy-eight".