12666202126 has 4 divisors (see below), whose sum is σ = 18999303192. Its totient is φ = 6333101062.

The previous prime is 12666202103. The next prime is 12666202127. The reversal of 12666202126 is 62120266621.

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

It is a junction number, because it is equal to n+sod(n) for n = 12666202091 and 12666202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666202127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166550530 + ... + 3166550533.

It is an arithmetic number, because the mean of its divisors is an integer number (4749825798).

Almost surely, 2^12666202126 is an apocalyptic number.

12666202126 is a deficient number, since it is larger than the sum of its proper divisors (6333101066).

12666202126 is an equidigital number, since it uses as much as digits as its factorization.

12666202126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6333101065.

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 12666202126 its reverse (62120266621), we get a palindrome (74786468747).

The spelling of 12666202126 in words is "twelve billion, six hundred sixty-six million, two hundred two thousand, one hundred twenty-six".