129011312 has 20 divisors (see below), whose sum is σ = 250176696. Its totient is φ = 64449600.

The previous prime is 129011269. The next prime is 129011327. The reversal of 129011312 is 213110921.

It is a super-2 number, since 2×129011312² = 33287837247922688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20438 + ... + 25994.

Almost surely, 2^129011312 is an apocalyptic number.

It is an amenable number.

129011312 is a deficient number, since it is larger than the sum of its proper divisors (121165384).

129011312 is a wasteful number, since it uses less digits than its factorization.

129011312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7016 (or 7010 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 129011312 is about 11358.3146637166. The cubic root of 129011312 is about 505.2922035355.

The spelling of 129011312 in words is "one hundred twenty-nine million, eleven thousand, three hundred twelve".