23121201 has 4 divisors (see below), whose sum is σ = 30828272. Its totient is φ = 15414132.

The previous prime is 23121193. The next prime is 23121209. The reversal of 23121201 is 10212132.

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.

It is an interprime number because it is at equal distance from previous prime (23121193) and next prime (23121209).

It is not a de Polignac number, because 23121201 - 2³ = 23121193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23121209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3853531 + ... + 3853536.

It is an arithmetic number, because the mean of its divisors is an integer number (7707068).

Almost surely, 2^23121201 is an apocalyptic number.

It is an amenable number.

23121201 is a deficient number, since it is larger than the sum of its proper divisors (7707071).

23121201 is an equidigital number, since it uses as much as digits as its factorization.

23121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7707070.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 23121201 is about 4808.4509979826. The cubic root of 23121201 is about 284.8853586316.

Adding to 23121201 its reverse (10212132), we get a palindrome (33333333).

The spelling of 23121201 in words is "twenty-three million, one hundred twenty-one thousand, two hundred one".