121235123 has 4 divisors (see below), whose sum is σ = 121448760. Its totient is φ = 121021488.

The previous prime is 121235111. The next prime is 121235171. The reversal of 121235123 is 321532121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321532121 = 113 ⋅2845417.

It is a cyclic number.

It is not a de Polignac number, because 121235123 - 2¹⁴ = 121218739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121235095 and 121235104.

It is not an unprimeable number, because it can be changed into a prime (121235183) 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, 105965 + ... + 107102.

It is an arithmetic number, because the mean of its divisors is an integer number (30362190).

Almost surely, 2^121235123 is an apocalyptic number.

121235123 is a deficient number, since it is larger than the sum of its proper divisors (213637).

121235123 is an equidigital number, since it uses as much as digits as its factorization.

121235123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213636.

The product of its digits is 360, while the sum is 20.

The square root of 121235123 is about 11010.6822222785. The cubic root of 121235123 is about 494.9289058866.

Adding to 121235123 its reverse (321532121), we get a palindrome (442767244).

The spelling of 121235123 in words is "one hundred twenty-one million, two hundred thirty-five thousand, one hundred twenty-three".