12522121 has 4 divisors (see below), whose sum is σ = 13181200. Its totient is φ = 11863044.

The previous prime is 12522091. The next prime is 12522131. The reversal of 12522121 is 12122521.

It is a happy number.

12522121 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 12122521 = 929 ⋅13049.

It is a cyclic number.

It is not a de Polignac number, because 12522121 - 2⁵ = 12522089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12522095 and 12522104.

It is not an unprimeable number, because it can be changed into a prime (12522131) 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, 329511 + ... + 329548.

It is an arithmetic number, because the mean of its divisors is an integer number (3295300).

Almost surely, 2^12522121 is an apocalyptic number.

It is an amenable number.

12522121 is a deficient number, since it is larger than the sum of its proper divisors (659079).

12522121 is an equidigital number, since it uses as much as digits as its factorization.

12522121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659078.

The product of its digits is 80, while the sum is 16.

The square root of 12522121 is about 3538.6609049187. The cubic root of 12522121 is about 232.2162631177.

Adding to 12522121 its reverse (12122521), we get a palindrome (24644642).

The spelling of 12522121 in words is "twelve million, five hundred twenty-two thousand, one hundred twenty-one".