12225320422521 has 4 divisors (see below), whose sum is σ = 16300427230032. Its totient is φ = 8150213615012.

The previous prime is 12225320422519. The next prime is 12225320422559. The reversal of 12225320422521 is 12522402352221.

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 a cyclic number.

It is not a de Polignac number, because 12225320422521 - 2¹ = 12225320422519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12225320422621) 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, 2037553403751 + ... + 2037553403756.

It is an arithmetic number, because the mean of its divisors is an integer number (4075106807508).

Almost surely, 2^{12225320422521} is an apocalyptic number.

It is an amenable number.

12225320422521 is a deficient number, since it is larger than the sum of its proper divisors (4075106807511).

12225320422521 is an equidigital number, since it uses as much as digits as its factorization.

12225320422521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075106807510.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 12225320422521 its reverse (12522402352221), we get a palindrome (24747722774742).

The spelling of 12225320422521 in words is "twelve trillion, two hundred twenty-five billion, three hundred twenty million, four hundred twenty-two thousand, five hundred twenty-one".