111421040 has 20 divisors (see below), whose sum is σ = 259054104. Its totient is φ = 44568384.

The previous prime is 111421031. The next prime is 111421049. The reversal of 111421040 is 40124111.

It is an interprime number because it is at equal distance from previous prime (111421031) and next prime (111421049).

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696302 + ... + 696461.

Almost surely, 2^111421040 is an apocalyptic number.

111421040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111421040 is an abundant number, since it is smaller than the sum of its proper divisors (147633064).

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

111421040 is a wasteful number, since it uses less digits than its factorization.

111421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392776 (or 1392770 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 111421040 is about 10555.6165144439. The cubic root of 111421040 is about 481.1964366090.

Adding to 111421040 its reverse (40124111), we get a palindrome (151545151).

The spelling of 111421040 in words is "one hundred eleven million, four hundred twenty-one thousand, forty".