111443424420 has 96 divisors (see below), whose sum is σ = 312855984000. Its totient is φ = 29640812544.

The previous prime is 111443424409. The next prime is 111443424437. The reversal of 111443424420 is 24424344111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53092531 + ... + 53094629.

It is an arithmetic number, because the mean of its divisors is an integer number (3258916500).

Almost surely, 2^111443424420 is an apocalyptic number.

111443424420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111443424420 is an abundant number, since it is smaller than the sum of its proper divisors (201412559580).

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

111443424420 is a wasteful number, since it uses less digits than its factorization.

111443424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 111443424420 its reverse (24424344111), we get a palindrome (135867768531).

The spelling of 111443424420 in words is "one hundred eleven billion, four hundred forty-three million, four hundred twenty-four thousand, four hundred twenty".