13221032129 has 2 divisors, whose sum is σ = 13221032130. Its totient is φ = 13221032128.

The previous prime is 13221032093. The next prime is 13221032131. The reversal of 13221032129 is 92123012231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10988280625 + 2232751504 = 104825^2 + 47252^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221032129 - 2¹² = 13221028033 is a prime.

Together with 13221032131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13221032098 and 13221032107.

It is not a weakly prime, because it can be changed into another prime (13221032189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610516064 + 6610516065.

It is an arithmetic number, because the mean of its divisors is an integer number (6610516065).

Almost surely, 2^13221032129 is an apocalyptic number.

It is an amenable number.

13221032129 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221032129 is an equidigital number, since it uses as much as digits as its factorization.

13221032129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 13221032129 in words is "thirteen billion, two hundred twenty-one million, thirty-two thousand, one hundred twenty-nine".