12873834821 has 2 divisors, whose sum is σ = 12873834822. Its totient is φ = 12873834820.

The previous prime is 12873834803. The next prime is 12873834833. The reversal of 12873834821 is 12843837821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9714270721 + 3159564100 = 98561^2 + 56210^2 .

It is a cyclic number.

It is not a de Polignac number, because 12873834821 - 2¹⁴ = 12873818437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12873834521) 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, 6436917410 + 6436917411.

It is an arithmetic number, because the mean of its divisors is an integer number (6436917411).

Almost surely, 2^12873834821 is an apocalyptic number.

It is an amenable number.

12873834821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12873834821 is an equidigital number, since it uses as much as digits as its factorization.

12873834821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 47.

The spelling of 12873834821 in words is "twelve billion, eight hundred seventy-three million, eight hundred thirty-four thousand, eight hundred twenty-one".