111280103424 has 448 divisors, whose sum is σ = 386208910080. Its totient is φ = 31001149440.

The previous prime is 111280103413. The next prime is 111280103437. The reversal of 111280103424 is 424301082111.

111280103424 is a `hidden beast` number, since 11 + 128 + 0 + 103 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a super-2 number, since 2×111280103424² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63478932 + ... + 63480684.

It is an arithmetic number, because the mean of its divisors is an integer number (862073460).

Almost surely, 2^111280103424 is an apocalyptic number.

111280103424 is a gapful number since it is divisible by the number (14) 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 111280103424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193104455040).

111280103424 is an abundant number, since it is smaller than the sum of its proper divisors (274928806656).

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

111280103424 is an equidigital number, since it uses as much as digits as its factorization.

111280103424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836 (or 1806 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 111280103424 its reverse (424301082111), we get a palindrome (535581185535).

The spelling of 111280103424 in words is "one hundred eleven billion, two hundred eighty million, one hundred three thousand, four hundred twenty-four".