111421819440 has 480 divisors, whose sum is σ = 397106012160. Its totient is φ = 27957196800.

The previous prime is 111421819433. The next prime is 111421819451. The reversal of 111421819440 is 44918124111.

111421819440 is a `hidden beast` number, since 1 + 1 + 1 + 421 + 8 + 194 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 111421819395 and 111421819404.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 154967401 + ... + 154968119.

It is an arithmetic number, because the mean of its divisors is an integer number (827304192).

Almost surely, 2^111421819440 is an apocalyptic number.

111421819440 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 111421819440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198553006080).

111421819440 is an abundant number, since it is smaller than the sum of its proper divisors (285684192720).

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

111421819440 is a wasteful number, since it uses less digits than its factorization.

111421819440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 111421819440 in words is "one hundred eleven billion, four hundred twenty-one million, eight hundred nineteen thousand, four hundred forty".