129130123272 has 32 divisors (see below), whose sum is σ = 326021604480. Its totient is φ = 42617201600.

The previous prime is 129130123267. The next prime is 129130123303. The reversal of 129130123272 is 272321031921.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26633328 + ... + 26638175.

It is an arithmetic number, because the mean of its divisors is an integer number (10188175140).

Almost surely, 2^129130123272 is an apocalyptic number.

129130123272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129130123272 is an abundant number, since it is smaller than the sum of its proper divisors (196891481208).

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

129130123272 is a wasteful number, since it uses less digits than its factorization.

129130123272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53271613 (or 53271609 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 129130123272 in words is "one hundred twenty-nine billion, one hundred thirty million, one hundred twenty-three thousand, two hundred seventy-two".