112121129 has 4 divisors (see below), whose sum is σ = 114236676. Its totient is φ = 110005584.

The previous prime is 112121117. The next prime is 112121143. The reversal of 112121129 is 921121211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921121211 = 41 ⋅22466371.

It can be written as a sum of positive squares in 2 ways, for example, as 57760000 + 54361129 = 7600^2 + 7373^2 .

It is a cyclic number.

It is not a de Polignac number, because 112121129 - 2²⁰ = 111072553 is a prime.

It is a super-2 number, since 2×112121129² = 25142295136469282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 112121129.

It is not an unprimeable number, because it can be changed into a prime (112121029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057694 + ... + 1057799.

It is an arithmetic number, because the mean of its divisors is an integer number (28559169).

Almost surely, 2^112121129 is an apocalyptic number.

It is an amenable number.

112121129 is a deficient number, since it is larger than the sum of its proper divisors (2115547).

112121129 is an equidigital number, since it uses as much as digits as its factorization.

112121129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2115546.

The product of its digits is 72, while the sum is 20.

The square root of 112121129 is about 10588.7265051091. The cubic root of 112121129 is about 482.2021629189.

The spelling of 112121129 in words is "one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-nine".