111340440021 has 8 divisors (see below), whose sum is σ = 156267284320. Its totient is φ = 70320277872.

The previous prime is 111340439971. The next prime is 111340440023. The reversal of 111340440021 is 120044043111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111340440021 - 2³⁴ = 94160570837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111340440021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111340440023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 976670470 + ... + 976670583.

It is an arithmetic number, because the mean of its divisors is an integer number (19533410540).

Almost surely, 2^111340440021 is an apocalyptic number.

It is an amenable number.

111340440021 is a deficient number, since it is larger than the sum of its proper divisors (44926844299).

111340440021 is a wasteful number, since it uses less digits than its factorization.

111340440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953341075.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 111340440021 its reverse (120044043111), we get a palindrome (231384483132).

The spelling of 111340440021 in words is "one hundred eleven billion, three hundred forty million, four hundred forty thousand, twenty-one".