23400121 has 4 divisors (see below), whose sum is σ = 23411700. Its totient is φ = 23388544.

The previous prime is 23400103. The next prime is 23400161. The reversal of 23400121 is 12100432.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11806096 + 11594025 = 3436^2 + 3405^2 .

It is a cyclic number.

It is not a de Polignac number, because 23400121 - 2⁵ = 23400089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23400161) 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, 1876 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (5852925).

Almost surely, 2^23400121 is an apocalyptic number.

It is an amenable number.

23400121 is a deficient number, since it is larger than the sum of its proper divisors (11579).

23400121 is an equidigital number, since it uses as much as digits as its factorization.

23400121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11578.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23400121 is about 4837.3671557987. The cubic root of 23400121 is about 286.0263436050.

Adding to 23400121 its reverse (12100432), we get a palindrome (35500553).

The spelling of 23400121 in words is "twenty-three million, four hundred thousand, one hundred twenty-one".