12876821131 has 2 divisors, whose sum is σ = 12876821132. Its totient is φ = 12876821130.

The previous prime is 12876821107. The next prime is 12876821249. The reversal of 12876821131 is 13112867821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12876821131 - 2¹⁹ = 12876296843 is a prime.

It is a super-2 number, since 2×12876821131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12876821731) 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, 6438410565 + 6438410566.

It is an arithmetic number, because the mean of its divisors is an integer number (6438410566).

Almost surely, 2^12876821131 is an apocalyptic number.

12876821131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12876821131 is an equidigital number, since it uses as much as digits as its factorization.

12876821131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The spelling of 12876821131 in words is "twelve billion, eight hundred seventy-six million, eight hundred twenty-one thousand, one hundred thirty-one".