12557211610211 has 4 divisors (see below), whose sum is σ = 13295871116712. Its totient is φ = 11818552103712.

The previous prime is 12557211610193. The next prime is 12557211610247. The reversal of 12557211610211 is 11201611275521.

12557211610211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12557211610211 - 2⁶ = 12557211610147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12557211610261) 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, 369329753225 + ... + 369329753258.

It is an arithmetic number, because the mean of its divisors is an integer number (3323967779178).

Almost surely, 2^{12557211610211} is an apocalyptic number.

12557211610211 is a deficient number, since it is larger than the sum of its proper divisors (738659506501).

12557211610211 is an equidigital number, since it uses as much as digits as its factorization.

12557211610211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738659506500.

The product of its (nonzero) digits is 8400, while the sum is 35.

Adding to 12557211610211 its reverse (11201611275521), we get a palindrome (23758822885732).

The spelling of 12557211610211 in words is "twelve trillion, five hundred fifty-seven billion, two hundred eleven million, six hundred ten thousand, two hundred eleven".