112126921 has 3 divisors (see below), whose sum is σ = 112137511.
Its totient is φ = 112116332.
The previous prime is 112126919. The next prime is 112126939. The reversal of 112126921 is 129621211.
It is a happy number.
The square root of 112126921 is 10589.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in only one way, i.e., 14907321 + 97219600 = 3861^2 + 9860^2
It is not a de Polignac number, because 112126921 - 21 = 112126919 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (112126901) 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 2 ways as a sum of consecutive naturals, for example, 5295 + ... + 15883.
Almost surely, 2112126921 is an apocalyptic number.
112126921 is the 10589-th square number.
112126921 is the 5295-th centered octagonal number.
It is an amenable number.
112126921 is a deficient number, since it is larger than the sum of its proper divisors (10590).
112126921 is an frugal number, since it uses more digits than its factorization.
112126921 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 21178 (or 10589 counting only the distinct ones).
The product of its digits is 432, while the sum is 25.
The cubic root of 112126921 is about 482.2104660427.
Multiplying 112126921 by its sum of digits (25), we get a square (2803173025 = 529452).
The spelling of 112126921 in words is "one hundred twelve million, one hundred twenty-six thousand, nine hundred twenty-one".