12421902506 has 32 divisors (see below), whose sum is σ = 20829166848. Its totient is φ = 5519183040.

The previous prime is 12421902503. The next prime is 12421902527. The reversal of 12421902506 is 60520912421.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 8780 + ... + 157863.

It is an arithmetic number, because the mean of its divisors is an integer number (650911464).

Almost surely, 2^12421902506 is an apocalyptic number.

12421902506 is a deficient number, since it is larger than the sum of its proper divisors (8407264342).

12421902506 is a wasteful number, since it uses less digits than its factorization.

12421902506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166766.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 12421902506 in words is "twelve billion, four hundred twenty-one million, nine hundred two thousand, five hundred six".