129821804804 has 48 divisors (see below), whose sum is σ = 233231104512. Its totient is φ = 63210000000.

The previous prime is 129821804797. The next prime is 129821804837. The reversal of 129821804804 is 408408128921.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 12357554 + ... + 12368054.

It is an arithmetic number, because the mean of its divisors is an integer number (4858981344).

Almost surely, 2^129821804804 is an apocalyptic number.

It is an amenable number.

129821804804 is a deficient number, since it is larger than the sum of its proper divisors (103409299708).

129821804804 is a wasteful number, since it uses less digits than its factorization.

129821804804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11108 (or 11106 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 129821804804 in words is "one hundred twenty-nine billion, eight hundred twenty-one million, eight hundred four thousand, eight hundred four".