11843384821 has 2 divisors, whose sum is σ = 11843384822. Its totient is φ = 11843384820.

The previous prime is 11843384759. The next prime is 11843384843. The reversal of 11843384821 is 12848334811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9640490596 + 2202894225 = 98186^2 + 46935^2 .

It is a cyclic number.

It is not a de Polignac number, because 11843384821 - 2¹⁷ = 11843253749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11843384851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5921692410 + 5921692411.

It is an arithmetic number, because the mean of its divisors is an integer number (5921692411).

Almost surely, 2^11843384821 is an apocalyptic number.

It is an amenable number.

11843384821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11843384821 is an equidigital number, since it uses as much as digits as its factorization.

11843384821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 43.

The spelling of 11843384821 in words is "eleven billion, eight hundred forty-three million, three hundred eighty-four thousand, eight hundred twenty-one".