129505811003 has 2 divisors, whose sum is σ = 129505811004. Its totient is φ = 129505811002.

The previous prime is 129505810999. The next prime is 129505811059. The reversal of 129505811003 is 300118505921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129505811003 - 2² = 129505810999 is a prime.

It is not a weakly prime, because it can be changed into another prime (129505811093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64752905501 + 64752905502.

It is an arithmetic number, because the mean of its divisors is an integer number (64752905502).

Almost surely, 2^129505811003 is an apocalyptic number.

129505811003 is a deficient number, since it is larger than the sum of its proper divisors (1).

129505811003 is an equidigital number, since it uses as much as digits as its factorization.

129505811003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 129505811003 in words is "one hundred twenty-nine billion, five hundred five million, eight hundred eleven thousand, three".