112121321 has 4 divisors (see below), whose sum is σ = 120746052. Its totient is φ = 103496592.

The previous prime is 112121311. The next prime is 112121333. The reversal of 112121321 is 123121211.

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 4791721 + 107329600 = 2189^2 + 10360^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121321 - 2⁶ = 112121257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 112121296 and 112121305.

It is not an unprimeable number, because it can be changed into a prime (112121311) 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, 4312346 + ... + 4312371.

It is an arithmetic number, because the mean of its divisors is an integer number (30186513).

Almost surely, 2^112121321 is an apocalyptic number.

It is an amenable number.

112121321 is a deficient number, since it is larger than the sum of its proper divisors (8624731).

112121321 is an equidigital number, since it uses as much as digits as its factorization.

112121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8624730.

The product of its digits is 24, while the sum is 14.

The square root of 112121321 is about 10588.7355713513. The cubic root of 112121321 is about 482.2024381652.

Adding to 112121321 its reverse (123121211), we get a palindrome (235242532).

The spelling of 112121321 in words is "one hundred twelve million, one hundred twenty-one thousand, three hundred twenty-one".