111113121432 has 128 divisors (see below), whose sum is σ = 290072908800. Its totient is φ = 35436331008.

The previous prime is 111113121419. The next prime is 111113121433. The reversal of 111113121432 is 234121311111.

It is a happy number.

It is a super-2 number, since 2×111113121432² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 111113121399 and 111113121408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111113121433) 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 31 ways as a sum of consecutive naturals, for example, 18025983 + ... + 18032145.

It is an arithmetic number, because the mean of its divisors is an integer number (2266194600).

Almost surely, 2^111113121432 is an apocalyptic number.

111113121432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111113121432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145036454400).

111113121432 is an abundant number, since it is smaller than the sum of its proper divisors (178959787368).

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

111113121432 is a wasteful number, since it uses less digits than its factorization.

111113121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6545 (or 6541 counting only the distinct ones).

The product of its digits is 144, while the sum is 21.

Adding to 111113121432 its reverse (234121311111), we get a palindrome (345234432543).

The spelling of 111113121432 in words is "one hundred eleven billion, one hundred thirteen million, one hundred twenty-one thousand, four hundred thirty-two".