505212120502 has 4 divisors (see below), whose sum is σ = 757818180756. Its totient is φ = 252606060250.

The previous prime is 505212120461. The next prime is 505212120509. The reversal of 505212120502 is 205021212505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 205021212505 = 5 ⋅41004242501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505212120509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126303030124 + ... + 126303030127.

It is an arithmetic number, because the mean of its divisors is an integer number (189454545189).

Almost surely, 2^505212120502 is an apocalyptic number.

505212120502 is a deficient number, since it is larger than the sum of its proper divisors (252606060254).

505212120502 is a wasteful number, since it uses less digits than its factorization.

505212120502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252606060253.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 505212120502 in words is "five hundred five billion, two hundred twelve million, one hundred twenty thousand, five hundred two".