129424850881 has 2 divisors, whose sum is σ = 129424850882. Its totient is φ = 129424850880.

The previous prime is 129424850851. The next prime is 129424850927. The reversal of 129424850881 is 188058424921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65208729600 + 64216121281 = 255360^2 + 253409^2 .

It is a cyclic number.

It is not a de Polignac number, because 129424850881 - 2¹³ = 129424842689 is a prime.

It is a super-2 number, since 2×129424850881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129424850851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64712425440 + 64712425441.

It is an arithmetic number, because the mean of its divisors is an integer number (64712425441).

Almost surely, 2^129424850881 is an apocalyptic number.

It is an amenable number.

129424850881 is a deficient number, since it is larger than the sum of its proper divisors (1).

129424850881 is an equidigital number, since it uses as much as digits as its factorization.

129424850881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1474560, while the sum is 52.

The spelling of 129424850881 in words is "one hundred twenty-nine billion, four hundred twenty-four million, eight hundred fifty thousand, eight hundred eighty-one".