505212134412 has 12 divisors (see below), whose sum is σ = 1178828313656. Its totient is φ = 168404044800.

The previous prime is 505212134393. The next prime is 505212134423. The reversal of 505212134412 is 214431212505.

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

It is a self number, because there is not a number n which added to its sum of digits gives 505212134412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21050505589 + ... + 21050505612.

Almost surely, 2^505212134412 is an apocalyptic number.

It is an amenable number.

505212134412 is an abundant number, since it is smaller than the sum of its proper divisors (673616179244).

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

505212134412 is a wasteful number, since it uses less digits than its factorization.

505212134412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42101011208 (or 42101011206 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 505212134412 its reverse (214431212505), we get a palindrome (719643346917).

The spelling of 505212134412 in words is "five hundred five billion, two hundred twelve million, one hundred thirty-four thousand, four hundred twelve".