12406842021 has 16 divisors (see below), whose sum is σ = 18918476928. Its totient is φ = 7084819200.

The previous prime is 12406842011. The next prime is 12406842043. The reversal of 12406842021 is 12024860421.

It is not a de Polignac number, because 12406842021 - 2⁶ = 12406841957 is a prime.

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 12406842021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12406842011) 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, 168360 + ... + 230561.

It is an arithmetic number, because the mean of its divisors is an integer number (1182404808).

Almost surely, 2^12406842021 is an apocalyptic number.

It is an amenable number.

12406842021 is a deficient number, since it is larger than the sum of its proper divisors (6511634907).

12406842021 is a wasteful number, since it uses less digits than its factorization.

12406842021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400412.

The product of its (nonzero) digits is 6144, while the sum is 30.

The spelling of 12406842021 in words is "twelve billion, four hundred six million, eight hundred forty-two thousand, twenty-one".