12421902505 has 8 divisors (see below), whose sum is σ = 15005001024. Its totient is φ = 9871710000.

The previous prime is 12421902503. The next prime is 12421902527. The reversal of 12421902505 is 50520912421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12421902505 - 2¹ = 12421902503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12421902503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8225671 + ... + 8227180.

It is an arithmetic number, because the mean of its divisors is an integer number (1875625128).

Almost surely, 2^12421902505 is an apocalyptic number.

It is an amenable number.

12421902505 is a deficient number, since it is larger than the sum of its proper divisors (2583098519).

12421902505 is a wasteful number, since it uses less digits than its factorization.

12421902505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16453007.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 12421902505 in words is "twelve billion, four hundred twenty-one million, nine hundred two thousand, five hundred five".