129820239544271 has 2 divisors, whose sum is σ = 129820239544272. Its totient is φ = 129820239544270.

The previous prime is 129820239544231. The next prime is 129820239544379. The reversal of 129820239544271 is 172445932028921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129820239544271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129820239544271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129820239544231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64910119772135 + 64910119772136.

It is an arithmetic number, because the mean of its divisors is an integer number (64910119772136).

Almost surely, 2^{129820239544271} is an apocalyptic number.

129820239544271 is a deficient number, since it is larger than the sum of its proper divisors (1).

129820239544271 is an equidigital number, since it uses as much as digits as its factorization.

129820239544271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 129820239544271 in words is "one hundred twenty-nine trillion, eight hundred twenty billion, two hundred thirty-nine million, five hundred forty-four thousand, two hundred seventy-one".