111212044424 has 128 divisors (see below), whose sum is σ = 245887488000. Its totient is φ = 46695916800.

The previous prime is 111212044423. The next prime is 111212044429. The reversal of 111212044424 is 424440212111.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 111212044393 and 111212044402.

It is not an unprimeable number, because it can be changed into a prime (111212044421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8017607 + ... + 8031465.

It is an arithmetic number, because the mean of its divisors is an integer number (1920996000).

Almost surely, 2^111212044424 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 111212044424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122943744000).

111212044424 is an abundant number, since it is smaller than the sum of its proper divisors (134675443576).

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

111212044424 is a wasteful number, since it uses less digits than its factorization.

111212044424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14059 (or 14055 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 111212044424 its reverse (424440212111), we get a palindrome (535652256535).

The spelling of 111212044424 in words is "one hundred eleven billion, two hundred twelve million, forty-four thousand, four hundred twenty-four".