23121103 has 2 divisors, whose sum is σ = 23121104. Its totient is φ = 23121102.

The previous prime is 23121101. The next prime is 23121127. The reversal of 23121103 is 30112132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23121103 - 2¹ = 23121101 is a prime.

Together with 23121101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23121101) 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 as a sum of consecutive naturals, namely, 11560551 + 11560552.

It is an arithmetic number, because the mean of its divisors is an integer number (11560552).

Almost surely, 2^23121103 is an apocalyptic number.

23121103 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121103 is an equidigital number, since it uses as much as digits as its factorization.

23121103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 23121103 is about 4808.4408075799. The cubic root of 23121103 is about 284.8849561322.

Adding to 23121103 its reverse (30112132), we get a palindrome (53233235).

The spelling of 23121103 in words is "twenty-three million, one hundred twenty-one thousand, one hundred three".