111421440000 has 1200 divisors, whose sum is σ = 458591203840. Its totient is φ = 26542080000.

The previous prime is 111421439957. The next prime is 111421440007. The reversal of 111421440000 is 44124111.

It is a tau number, because it is divible by the number of its divisors (1200).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111421440007) 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 79 ways as a sum of consecutive naturals, for example, 3594239985 + ... + 3594240015.

Almost surely, 2^111421440000 is an apocalyptic number.

111421440000 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 111421440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229295601920).

111421440000 is an abundant number, since it is smaller than the sum of its proper divisors (347169763840).

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

111421440000 is an frugal number, since it uses more digits than its factorization.

111421440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111421440000 its reverse (44124111), we get a palindrome (111465564111).

The spelling of 111421440000 in words is "one hundred eleven billion, four hundred twenty-one million, four hundred forty thousand".