12021678443 has 2 divisors, whose sum is σ = 12021678444. Its totient is φ = 12021678442.

The previous prime is 12021678379. The next prime is 12021678451. The reversal of 12021678443 is 34487612021.

It is a strong prime.

It is an emirp because it is prime and its reverse (34487612021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12021678443 - 2⁶ = 12021678379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021678397 and 12021678406.

It is not a weakly prime, because it can be changed into another prime (12021674443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010839221 + 6010839222.

It is an arithmetic number, because the mean of its divisors is an integer number (6010839222).

Almost surely, 2^12021678443 is an apocalyptic number.

12021678443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021678443 is an equidigital number, since it uses as much as digits as its factorization.

12021678443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 12021678443 in words is "twelve billion, twenty-one million, six hundred seventy-eight thousand, four hundred forty-three".