123043121 has 4 divisors (see below), whose sum is σ = 123337200. Its totient is φ = 122749044.

The previous prime is 123043111. The next prime is 123043139. The reversal of 123043121 is 121340321.

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.

It is a cyclic number.

It is not a de Polignac number, because 123043121 - 2⁶ = 123043057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123043121.

It is not an unprimeable number, because it can be changed into a prime (123043111) 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, 146411 + ... + 147248.

It is an arithmetic number, because the mean of its divisors is an integer number (30834300).

Almost surely, 2^123043121 is an apocalyptic number.

It is an amenable number.

123043121 is a deficient number, since it is larger than the sum of its proper divisors (294079).

123043121 is an equidigital number, since it uses as much as digits as its factorization.

123043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294078.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123043121 is about 11092.4803808706. The cubic root of 123043121 is about 497.3770927749.

Adding to 123043121 its reverse (121340321), we get a palindrome (244383442).

The spelling of 123043121 in words is "one hundred twenty-three million, forty-three thousand, one hundred twenty-one".