23142121 has 4 divisors (see below), whose sum is σ = 23151744. Its totient is φ = 23132500.

The previous prime is 23142107. The next prime is 23142157. The reversal of 23142121 is 12124132.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23142121 - 2²³ = 14753513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23142095 and 23142104.

It is not an unprimeable number, because it can be changed into a prime (23142191) 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, 2316 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (5787936).

Almost surely, 2^23142121 is an apocalyptic number.

It is an amenable number.

23142121 is a deficient number, since it is larger than the sum of its proper divisors (9623).

23142121 is an equidigital number, since it uses as much as digits as its factorization.

23142121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9622.

The product of its digits is 96, while the sum is 16.

The square root of 23142121 is about 4810.6258428608. The cubic root of 23142121 is about 284.9712538976.

Adding to 23142121 its reverse (12124132), we get a palindrome (35266253).

The spelling of 23142121 in words is "twenty-three million, one hundred forty-two thousand, one hundred twenty-one".