111042421 has 8 divisors (see below), whose sum is σ = 131281920. Its totient is φ = 91897008.

The previous prime is 111042401. The next prime is 111042427. The reversal of 111042421 is 124240111.

It is a happy number.

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

It is not a de Polignac number, because 111042421 - 2⁵ = 111042389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111042395 and 111042404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111042427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273301 + ... + 273706.

It is an arithmetic number, because the mean of its divisors is an integer number (16410240).

Almost surely, 2^111042421 is an apocalyptic number.

It is an amenable number.

111042421 is a deficient number, since it is larger than the sum of its proper divisors (20239499).

111042421 is an equidigital number, since it uses as much as digits as its factorization.

111042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547043.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 111042421 is about 10537.6667721085. Note that the first 3 decimals coincide. The cubic root of 111042421 is about 480.6507680639.

Adding to 111042421 its reverse (124240111), we get a palindrome (235282532).

The spelling of 111042421 in words is "one hundred eleven million, forty-two thousand, four hundred twenty-one".