129520949712 has 720 divisors, whose sum is σ = 451582096896. Its totient is φ = 31826995200.

The previous prime is 129520949711. The next prime is 129520949713. The reversal of 129520949712 is 217949025921.

It is an interprime number because it is at equal distance from previous prime (129520949711) and next prime (129520949713).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129520949711) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 467584518 + ... + 467584794.

Almost surely, 2^129520949712 is an apocalyptic number.

129520949712 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 129520949712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225791048448).

129520949712 is an abundant number, since it is smaller than the sum of its proper divisors (322061147184).

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

129520949712 is a wasteful number, since it uses less digits than its factorization.

129520949712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 129520949712 in words is "one hundred twenty-nine billion, five hundred twenty million, nine hundred forty-nine thousand, seven hundred twelve".