505342123211 has 4 divisors (see below), whose sum is σ = 505366733424. Its totient is φ = 505317513000.

The previous prime is 505342123189. The next prime is 505342123217. The reversal of 505342123211 is 112321243505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505342123211 - 2⁶ = 505342123147 is a prime.

It is a super-2 number, since 2×505342123211² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505342123217) 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 in 3 ways as a sum of consecutive naturals, for example, 12274280 + ... + 12315381.

It is an arithmetic number, because the mean of its divisors is an integer number (126341683356).

Almost surely, 2^505342123211 is an apocalyptic number.

505342123211 is a deficient number, since it is larger than the sum of its proper divisors (24610213).

505342123211 is a wasteful number, since it uses less digits than its factorization.

505342123211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24610212.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 505342123211 its reverse (112321243505), we get a palindrome (617663366716).

The spelling of 505342123211 in words is "five hundred five billion, three hundred forty-two million, one hundred twenty-three thousand, two hundred eleven".