111121324440 has 256 divisors, whose sum is σ = 402651648000. Its totient is φ = 23965632000.

The previous prime is 111121324429. The next prime is 111121324481. The reversal of 111121324440 is 44423121111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 111121324440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3992091 + ... + 4019829.

It is an arithmetic number, because the mean of its divisors is an integer number (1572858000).

Almost surely, 2^111121324440 is an apocalyptic number.

111121324440 is a gapful number since it is divisible by the number (10) 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 111121324440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201325824000).

111121324440 is an abundant number, since it is smaller than the sum of its proper divisors (291530323560).

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

111121324440 is a wasteful number, since it uses less digits than its factorization.

111121324440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28030 (or 28026 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 111121324440 its reverse (44423121111), we get a palindrome (155544445551).

The spelling of 111121324440 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred twenty-four thousand, four hundred forty".