109125121 has 4 divisors (see below), whose sum is σ = 124714432. Its totient is φ = 93535812.

The previous prime is 109125109. The next prime is 109125139. The reversal of 109125121 is 121521901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121521901 = 251 ⋅484151.

It is a cyclic number.

It is not a de Polignac number, because 109125121 - 2⁷ = 109124993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109125092 and 109125101.

It is not an unprimeable number, because it can be changed into a prime (109125421) 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, 7794645 + ... + 7794658.

It is an arithmetic number, because the mean of its divisors is an integer number (31178608).

Almost surely, 2^109125121 is an apocalyptic number.

It is an amenable number.

109125121 is a deficient number, since it is larger than the sum of its proper divisors (15589311).

109125121 is an equidigital number, since it uses as much as digits as its factorization.

109125121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15589310.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 109125121 is about 10446.2969994156. The cubic root of 109125121 is about 477.8683265053.

The spelling of 109125121 in words is "one hundred nine million, one hundred twenty-five thousand, one hundred twenty-one".