129444672241 has 2 divisors, whose sum is σ = 129444672242. Its totient is φ = 129444672240.

The previous prime is 129444672163. The next prime is 129444672251. The reversal of 129444672241 is 142276444921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128909721600 + 534950641 = 359040^2 + 23129^2 .

It is a cyclic number.

It is not a de Polignac number, because 129444672241 - 2¹³ = 129444664049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129444672191 and 129444672200.

It is not a weakly prime, because it can be changed into another prime (129444672251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64722336120 + 64722336121.

It is an arithmetic number, because the mean of its divisors is an integer number (64722336121).

Almost surely, 2^129444672241 is an apocalyptic number.

It is an amenable number.

129444672241 is a deficient number, since it is larger than the sum of its proper divisors (1).

129444672241 is an equidigital number, since it uses as much as digits as its factorization.

129444672241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 46.

The spelling of 129444672241 in words is "one hundred twenty-nine billion, four hundred forty-four million, six hundred seventy-two thousand, two hundred forty-one".