12566270121 has 4 divisors (see below), whose sum is σ = 16755026832. Its totient is φ = 8377513412.

The previous prime is 12566270117. The next prime is 12566270131. The reversal of 12566270121 is 12107266521.

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 12566270121 - 2² = 12566270117 is a prime.

It is a super-2 number, since 2×12566270121² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12566270131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094378351 + ... + 2094378356.

It is an arithmetic number, because the mean of its divisors is an integer number (4188756708).

Almost surely, 2^12566270121 is an apocalyptic number.

It is an amenable number.

12566270121 is a deficient number, since it is larger than the sum of its proper divisors (4188756711).

12566270121 is an equidigital number, since it uses as much as digits as its factorization.

12566270121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4188756710.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 12566270121 in words is "twelve billion, five hundred sixty-six million, two hundred seventy thousand, one hundred twenty-one".