129421711705 has 192 divisors, whose sum is σ = 204685470720. Its totient is φ = 77491814400.

The previous prime is 129421711687. The next prime is 129421711711. The reversal of 129421711705 is 507117124921.

It is not a de Polignac number, because 129421711705 - 2⁷ = 129421711577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 279528304 + ... + 279528766.

It is an arithmetic number, because the mean of its divisors is an integer number (1066070160).

Almost surely, 2^129421711705 is an apocalyptic number.

It is an amenable number.

129421711705 is a deficient number, since it is larger than the sum of its proper divisors (75263759015).

129421711705 is a wasteful number, since it uses less digits than its factorization.

129421711705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 129421711705 in words is "one hundred twenty-nine billion, four hundred twenty-one million, seven hundred eleven thousand, seven hundred five".