112228129 has 4 divisors (see below), whose sum is σ = 120861076. Its totient is φ = 103595184.

The previous prime is 112228121. The next prime is 112228133. The reversal of 112228129 is 921822211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921822211 = 22571 ⋅40841.

It can be written as a sum of positive squares in 2 ways, for example, as 76527504 + 35700625 = 8748^2 + 5975^2 .

It is a cyclic number.

It is not a de Polignac number, because 112228129 - 2³ = 112228121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112228097 and 112228106.

It is not an unprimeable number, because it can be changed into a prime (112228121) 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 3 ways as a sum of consecutive naturals, for example, 4316454 + ... + 4316479.

It is an arithmetic number, because the mean of its divisors is an integer number (30215269).

Almost surely, 2^112228129 is an apocalyptic number.

It is an amenable number.

112228129 is a deficient number, since it is larger than the sum of its proper divisors (8632947).

112228129 is an equidigital number, since it uses as much as digits as its factorization.

112228129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632946.

The product of its digits is 1152, while the sum is 28.

The square root of 112228129 is about 10593.7778436212. Note that the first 3 decimals coincide. The cubic root of 112228129 is about 482.3555066808.

The spelling of 112228129 in words is "one hundred twelve million, two hundred twenty-eight thousand, one hundred twenty-nine".