111111111000012 has 24 divisors (see below), whose sum is σ = 264150943133616. Its totient is φ = 36338224980928.

The previous prime is 111111110999891. The next prime is 111111111000023. The reversal of 111111111000012 is 210000111111111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87351501723 + ... + 87351502994.

It is an arithmetic number, because the mean of its divisors is an integer number (11006289297234).

Almost surely, 2^{111111111000012} is an apocalyptic number.

111111111000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111111111000012 is an abundant number, since it is smaller than the sum of its proper divisors (153039832133604).

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

111111111000012 is a wasteful number, since it uses less digits than its factorization.

111111111000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174703004777 (or 174703004775 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 111111111000012 its reverse (210000111111111), we get a palindrome (321111222111123).

The spelling of 111111111000012 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, twelve", and thus it is an aban number.