505129105212 has 12 divisors (see below), whose sum is σ = 1178634578856. Its totient is φ = 168376368400.

The previous prime is 505129105189. The next prime is 505129105219. The reversal of 505129105212 is 212501921505.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×505129105212³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505129105219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21047046039 + ... + 21047046062.

It is an arithmetic number, because the mean of its divisors is an integer number (98219548238).

Almost surely, 2^505129105212 is an apocalyptic number.

It is an amenable number.

505129105212 is an abundant number, since it is smaller than the sum of its proper divisors (673505473644).

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

505129105212 is a wasteful number, since it uses less digits than its factorization.

505129105212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42094092108 (or 42094092106 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 505129105212 in words is "five hundred five billion, one hundred twenty-nine million, one hundred five thousand, two hundred twelve".