12821043941 has 2 divisors, whose sum is σ = 12821043942. Its totient is φ = 12821043940.

The previous prime is 12821043931. The next prime is 12821044007. The reversal of 12821043941 is 14934012821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12817636225 + 3407716 = 113215^2 + 1846^2 .

It is a cyclic number.

It is not a de Polignac number, because 12821043941 - 2¹⁸ = 12820781797 is a prime.

It is a super-2 number, since 2×12821043941² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12821043931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410521970 + 6410521971.

It is an arithmetic number, because the mean of its divisors is an integer number (6410521971).

Almost surely, 2^12821043941 is an apocalyptic number.

It is an amenable number.

12821043941 is a deficient number, since it is larger than the sum of its proper divisors (1).

12821043941 is an equidigital number, since it uses as much as digits as its factorization.

12821043941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 12821043941 in words is "twelve billion, eight hundred twenty-one million, forty-three thousand, nine hundred forty-one".