129000881899 has 4 divisors (see below), whose sum is σ = 130926268264. Its totient is φ = 127075495536.

The previous prime is 129000881851. The next prime is 129000881909. The reversal of 129000881899 is 998188000921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129000881899 - 2¹¹ = 129000879851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129000881809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962693082 + ... + 962693215.

It is an arithmetic number, because the mean of its divisors is an integer number (32731567066).

Almost surely, 2^129000881899 is an apocalyptic number.

129000881899 is a deficient number, since it is larger than the sum of its proper divisors (1925386365).

129000881899 is an equidigital number, since it uses as much as digits as its factorization.

129000881899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925386364.

The product of its (nonzero) digits is 746496, while the sum is 55.

The spelling of 129000881899 in words is "one hundred twenty-nine billion, eight hundred eighty-one thousand, eight hundred ninety-nine".