129204801240 has 32 divisors (see below), whose sum is σ = 387614404080. Its totient is φ = 34454613632.

The previous prime is 129204801239. The next prime is 129204801247. The reversal of 129204801240 is 42108402921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129204801247) 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 in 7 ways as a sum of consecutive naturals, for example, 538353219 + ... + 538353458.

Almost surely, 2^129204801240 is an apocalyptic number.

129204801240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129204801240 is an abundant number, since it is smaller than the sum of its proper divisors (258409602840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129204801240 is a wasteful number, since it uses less digits than its factorization.

129204801240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076706691 (or 1076706687 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 129204801240 in words is "one hundred twenty-nine billion, two hundred four million, eight hundred one thousand, two hundred forty".