129549122641 has 2 divisors, whose sum is σ = 129549122642. Its totient is φ = 129549122640.

The previous prime is 129549122621. The next prime is 129549122699. The reversal of 129549122641 is 146221945921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108320632641 + 21228490000 = 329121^2 + 145700^2 .

It is an emirp because it is prime and its reverse (146221945921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129549122641 - 2⁵ = 129549122609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129549122591 and 129549122600.

It is not a weakly prime, because it can be changed into another prime (129549122611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64774561320 + 64774561321.

It is an arithmetic number, because the mean of its divisors is an integer number (64774561321).

Almost surely, 2^129549122641 is an apocalyptic number.

It is an amenable number.

129549122641 is a deficient number, since it is larger than the sum of its proper divisors (1).

129549122641 is an equidigital number, since it uses as much as digits as its factorization.

129549122641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 46.

The spelling of 129549122641 in words is "one hundred twenty-nine billion, five hundred forty-nine million, one hundred twenty-two thousand, six hundred forty-one".