23121143 has 8 divisors (see below), whose sum is σ = 23726208. Its totient is φ = 22519224.

The previous prime is 23121127. The next prime is 23121181. The reversal of 23121143 is 34112132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23121143 - 2⁴ = 23121127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23030 + ... + 24012.

It is an arithmetic number, because the mean of its divisors is an integer number (2965776).

Almost surely, 2^23121143 is an apocalyptic number.

23121143 is a deficient number, since it is larger than the sum of its proper divisors (605065).

23121143 is an equidigital number, since it uses as much as digits as its factorization.

23121143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

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

The square root of 23121143 is about 4808.4449669306. Note that the first 3 decimals coincide. The cubic root of 23121143 is about 284.8851204178.

Adding to 23121143 its reverse (34112132), we get a palindrome (57233275).

The spelling of 23121143 in words is "twenty-three million, one hundred twenty-one thousand, one hundred forty-three".