111140421 has 16 divisors (see below), whose sum is σ = 170024064. Its totient is φ = 63258624.

The previous prime is 111140387. The next prime is 111140429. The reversal of 111140421 is 124041111.

It is not a de Polignac number, because 111140421 - 2¹⁴ = 111124037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111140421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111140429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4900 + ... + 15693.

It is an arithmetic number, because the mean of its divisors is an integer number (10626504).

Almost surely, 2^111140421 is an apocalyptic number.

It is an amenable number.

111140421 is a deficient number, since it is larger than the sum of its proper divisors (58883643).

111140421 is a wasteful number, since it uses less digits than its factorization.

111140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20860.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 111140421 is about 10542.3157323237. The cubic root of 111140421 is about 480.7921252274.

Adding to 111140421 its reverse (124041111), we get a palindrome (235181532).

The spelling of 111140421 in words is "one hundred eleven million, one hundred forty thousand, four hundred twenty-one".