23121113 has 4 divisors (see below), whose sum is σ = 23131920. Its totient is φ = 23110308.

The previous prime is 23121103. The next prime is 23121127. The reversal of 23121113 is 31112132.

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 23121113 - 2⁸ = 23120857 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 995 + ... + 6872.

It is an arithmetic number, because the mean of its divisors is an integer number (5782980).

Almost surely, 2^23121113 is an apocalyptic number.

It is an amenable number.

23121113 is a deficient number, since it is larger than the sum of its proper divisors (10807).

23121113 is an equidigital number, since it uses as much as digits as its factorization.

23121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10806.

The product of its digits is 36, while the sum is 14.

The square root of 23121113 is about 4808.4418474179. The cubic root of 23121113 is about 284.8849972036.

Adding to 23121113 its reverse (31112132), we get a palindrome (54233245).

The spelling of 23121113 in words is "twenty-three million, one hundred twenty-one thousand, one hundred thirteen".