111240421 has 8 divisors (see below), whose sum is σ = 119952000.
Its totient is φ = 102814560.
The previous prime is 111240419. The next prime is 111240427. The reversal of 111240421 is 124042111.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 111240421 - 21 = 111240419 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 111240395 and 111240404.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (111240427) 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 7 ways as a sum of consecutive naturals, for example, 70621 + ... + 72178.
It is an arithmetic number, because the mean of its divisors is an integer number (14994000).
Almost surely, 2111240421 is an apocalyptic number.
It is an amenable number.
111240421 is a deficient number, since it is larger than the sum of its proper divisors (8711579).
111240421 is a wasteful number, since it uses less digits than its factorization.
111240421 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 142859.
The product of its (nonzero) digits is 64, while the sum is 16.
The square root of 111240421 is about 10547.0574569403.
The cubic root of 111240421 is about 480.9362815998.
Adding to 111240421 its reverse (124042111), we get a palindrome (235282532).
It can be divided in two parts, 11 and 1240421, that multiplied together give a palindrome (13644631).
The spelling of 111240421 in words is "one hundred eleven million, two hundred forty thousand, four hundred twenty-one".