13409221129 has 2 divisors, whose sum is σ = 13409221130. Its totient is φ = 13409221128.

The previous prime is 13409221127. The next prime is 13409221157. The reversal of 13409221129 is 92112290431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11480693904 + 1928527225 = 107148^2 + 43915^2 .

It is a cyclic number.

It is not a de Polignac number, because 13409221129 - 2¹ = 13409221127 is a prime.

It is a super-2 number, since 2×13409221129² (a number of 21 digits) contains 22 as substring.

Together with 13409221127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13409221094 and 13409221103.

It is not a weakly prime, because it can be changed into another prime (13409221127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704610564 + 6704610565.

It is an arithmetic number, because the mean of its divisors is an integer number (6704610565).

Almost surely, 2^13409221129 is an apocalyptic number.

It is an amenable number.

13409221129 is a deficient number, since it is larger than the sum of its proper divisors (1).

13409221129 is an equidigital number, since it uses as much as digits as its factorization.

13409221129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The spelling of 13409221129 in words is "thirteen billion, four hundred nine million, two hundred twenty-one thousand, one hundred twenty-nine".