23502121 has 2 divisors, whose sum is σ = 23502122. Its totient is φ = 23502120.

The previous prime is 23502097. The next prime is 23502137. The reversal of 23502121 is 12120532.

It is an a-pointer prime, because the next prime (23502137) can be obtained adding 23502121 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 7502121 = 4000^2 + 2739^2 .

It is a cyclic number.

It is not a de Polignac number, because 23502121 - 2⁹ = 23501609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23502095 and 23502104.

It is not a weakly prime, because it can be changed into another prime (23502191) 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, 11751060 + 11751061.

It is an arithmetic number, because the mean of its divisors is an integer number (11751061).

Almost surely, 2^23502121 is an apocalyptic number.

It is an amenable number.

23502121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23502121 is an equidigital number, since it uses as much as digits as its factorization.

23502121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23502121 is about 4847.8986169267. The cubic root of 23502121 is about 286.4413328986.

Adding to 23502121 its reverse (12120532), we get a palindrome (35622653).

The spelling of 23502121 in words is "twenty-three million, five hundred two thousand, one hundred twenty-one".