111132421 has 4 divisors (see below), whose sum is σ = 112232844. Its totient is φ = 110032000.

The previous prime is 111132403. The next prime is 111132433. The reversal of 111132421 is 124231111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73788100 + 37344321 = 8590^2 + 6111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111132421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111132395 and 111132404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111132401) 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 3 ways as a sum of consecutive naturals, for example, 550060 + ... + 550261.

It is an arithmetic number, because the mean of its divisors is an integer number (28058211).

Almost surely, 2^111132421 is an apocalyptic number.

It is an amenable number.

111132421 is a deficient number, since it is larger than the sum of its proper divisors (1100423).

111132421 is a wasteful number, since it uses less digits than its factorization.

111132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100422.

The product of its digits is 48, while the sum is 16.

The square root of 111132421 is about 10541.9363022170. The cubic root of 111132421 is about 480.7805889826.

Adding to 111132421 its reverse (124231111), we get a palindrome (235363532).

The spelling of 111132421 in words is "one hundred eleven million, one hundred thirty-two thousand, four hundred twenty-one".