111131123123132 has 96 divisors (see below), whose sum is σ = 238385991352320. Its totient is φ = 44245478983680.

The previous prime is 111131123123117. The next prime is 111131123123143. The reversal of 111131123123132 is 231321321131111.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 127079408 + ... + 127950920.

It is an arithmetic number, because the mean of its divisors is an integer number (2483187409920).

Almost surely, 2^{111131123123132} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111131123123132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119192995676160).

111131123123132 is an abundant number, since it is smaller than the sum of its proper divisors (127254868229188).

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

111131123123132 is a wasteful number, since it uses less digits than its factorization.

111131123123132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875011 (or 875009 counting only the distinct ones).

The product of its digits is 648, while the sum is 26.

Adding to 111131123123132 its reverse (231321321131111), we get a palindrome (342452444254243).

The spelling of 111131123123132 in words is "one hundred eleven trillion, one hundred thirty-one billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred thirty-two".