111131012268 has 36 divisors (see below), whose sum is σ = 281292652368. Its totient is φ = 36993804960.

The previous prime is 111131012263. The next prime is 111131012269. The reversal of 111131012268 is 862210131111.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (111131012263) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2050623 + ... + 2104118.

It is an arithmetic number, because the mean of its divisors is an integer number (7813684788).

Almost surely, 2^111131012268 is an apocalyptic number.

111131012268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

111131012268 is an abundant number, since it is smaller than the sum of its proper divisors (170161640100).

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

111131012268 is a wasteful number, since it uses less digits than its factorization.

111131012268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155494 (or 4155489 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

Adding to 111131012268 its reverse (862210131111), we get a palindrome (973341143379).

The spelling of 111131012268 in words is "one hundred eleven billion, one hundred thirty-one million, twelve thousand, two hundred sixty-eight".