12876821731 has 2 divisors, whose sum is σ = 12876821732. Its totient is φ = 12876821730.

The previous prime is 12876821707. The next prime is 12876821833. The reversal of 12876821731 is 13712867821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12876821731 - 2¹⁵ = 12876788963 is a prime.

It is a super-2 number, since 2×12876821731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12876821131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6438410865 + 6438410866.

It is an arithmetic number, because the mean of its divisors is an integer number (6438410866).

Almost surely, 2^12876821731 is an apocalyptic number.

12876821731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12876821731 is an equidigital number, since it uses as much as digits as its factorization.

12876821731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 46.

The spelling of 12876821731 in words is "twelve billion, eight hundred seventy-six million, eight hundred twenty-one thousand, seven hundred thirty-one".