12421507266 has 144 divisors (see below), whose sum is σ = 33437811264. Its totient is φ = 3262146048.

The previous prime is 12421507253. The next prime is 12421507289. The reversal of 12421507266 is 66270512421.

It is a happy number.

12421507266 is a `hidden beast` number, since 1 + 242 + 150 + 7 + 266 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12421507266.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1561836 + ... + 1569768.

Almost surely, 2^12421507266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12421507266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16718905632).

12421507266 is an abundant number, since it is smaller than the sum of its proper divisors (21016303998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421507266 is a wasteful number, since it uses less digits than its factorization.

12421507266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8025 (or 8005 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 12421507266 in words is "twelve billion, four hundred twenty-one million, five hundred seven thousand, two hundred sixty-six".