129013827161 has 2 divisors, whose sum is σ = 129013827162. Its totient is φ = 129013827160.

The previous prime is 129013827149. The next prime is 129013827167. The reversal of 129013827161 is 161728310921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78775087561 + 50238739600 = 280669^2 + 224140^2 .

It is a cyclic number.

It is not a de Polignac number, because 129013827161 - 2¹⁴ = 129013810777 is a prime.

It is not a weakly prime, because it can be changed into another prime (129013827167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64506913580 + 64506913581.

It is an arithmetic number, because the mean of its divisors is an integer number (64506913581).

Almost surely, 2^129013827161 is an apocalyptic number.

It is an amenable number.

129013827161 is a deficient number, since it is larger than the sum of its proper divisors (1).

129013827161 is an equidigital number, since it uses as much as digits as its factorization.

129013827161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 129013827161 in words is "one hundred twenty-nine billion, thirteen million, eight hundred twenty-seven thousand, one hundred sixty-one".