129424718281 has 2 divisors, whose sum is σ = 129424718282. Its totient is φ = 129424718280.

The previous prime is 129424718239. The next prime is 129424718323. The reversal of 129424718281 is 182817424921.

It is a balanced prime because it is at equal distance from previous prime (129424718239) and next prime (129424718323).

It can be written as a sum of positive squares in only one way, i.e., 83995632400 + 45429085881 = 289820^2 + 213141^2 .

It is a cyclic number.

It is not a de Polignac number, because 129424718281 - 2¹³ = 129424710089 is a prime.

It is a super-2 number, since 2×129424718281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129424718201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64712359140 + 64712359141.

It is an arithmetic number, because the mean of its divisors is an integer number (64712359141).

Almost surely, 2^129424718281 is an apocalyptic number.

It is an amenable number.

129424718281 is a deficient number, since it is larger than the sum of its proper divisors (1).

129424718281 is an equidigital number, since it uses as much as digits as its factorization.

129424718281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 49.

The spelling of 129424718281 in words is "one hundred twenty-nine billion, four hundred twenty-four million, seven hundred eighteen thousand, two hundred eighty-one".