12900512129 has 2 divisors, whose sum is σ = 12900512130. Its totient is φ = 12900512128.

The previous prime is 12900512111. The next prime is 12900512153. The reversal of 12900512129 is 92121500921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12450096400 + 450415729 = 111580^2 + 21223^2 .

It is a cyclic number.

It is not a de Polignac number, because 12900512129 - 2²⁰ = 12899463553 is a prime.

It is a super-2 number, since 2×12900512129² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12900512095 and 12900512104.

It is not a weakly prime, because it can be changed into another prime (12900512179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6450256064 + 6450256065.

It is an arithmetic number, because the mean of its divisors is an integer number (6450256065).

Almost surely, 2^12900512129 is an apocalyptic number.

It is an amenable number.

12900512129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12900512129 is an equidigital number, since it uses as much as digits as its factorization.

12900512129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 32.

The spelling of 12900512129 in words is "twelve billion, nine hundred million, five hundred twelve thousand, one hundred twenty-nine".