12525422221 has 8 divisors (see below), whose sum is σ = 13490820000. Its totient is φ = 11560296432.

The previous prime is 12525422191. The next prime is 12525422263. The reversal of 12525422221 is 12222452521.

12525422221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12525422221 - 2¹³ = 12525414029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12525422221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525422321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33246 + ... + 161728.

It is an arithmetic number, because the mean of its divisors is an integer number (1686352500).

Almost surely, 2^12525422221 is an apocalyptic number.

It is an amenable number.

12525422221 is a deficient number, since it is larger than the sum of its proper divisors (965397779).

12525422221 is a wasteful number, since it uses less digits than its factorization.

12525422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135995.

The product of its digits is 6400, while the sum is 28.

Adding to 12525422221 its reverse (12222452521), we get a palindrome (24747874742).

The spelling of 12525422221 in words is "twelve billion, five hundred twenty-five million, four hundred twenty-two thousand, two hundred twenty-one".