129101910672 has 80 divisors (see below), whose sum is σ = 381666301952. Its totient is φ = 36837072000.

The previous prime is 129101910601. The next prime is 129101910683. The reversal of 129101910672 is 276019101921.

It is a super-2 number, since 2×129101910672² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129101910672.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3478 + ... + 508149.

Almost surely, 2^129101910672 is an apocalyptic number.

129101910672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129101910672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190833150976).

129101910672 is an abundant number, since it is smaller than the sum of its proper divisors (252564391280).

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

129101910672 is a wasteful number, since it uses less digits than its factorization.

129101910672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512396 (or 512390 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 39.

It can be divided in two parts, 1291019 and 10672, that added together give a triangular number (1301691 = T₁₆₁₃).

The spelling of 129101910672 in words is "one hundred twenty-nine billion, one hundred one million, nine hundred ten thousand, six hundred seventy-two".