12660551121 has 8 divisors (see below), whose sum is σ = 16988256064. Its totient is φ = 8386606800.

The previous prime is 12660551107. The next prime is 12660551147. The reversal of 12660551121 is 12115506621.

12660551121 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 not a de Polignac number, because 12660551121 - 2¹⁴ = 12660534737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12660550121) 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, 13439605 + ... + 13440546.

It is an arithmetic number, because the mean of its divisors is an integer number (2123532008).

Almost surely, 2^12660551121 is an apocalyptic number.

It is an amenable number.

12660551121 is a deficient number, since it is larger than the sum of its proper divisors (4327704943).

12660551121 is a wasteful number, since it uses less digits than its factorization.

12660551121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26880311.

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 12660551121 in words is "twelve billion, six hundred sixty million, five hundred fifty-one thousand, one hundred twenty-one".