505321221242 has 16 divisors (see below), whose sum is σ = 784136413800. Its totient is φ = 243942800640.

The previous prime is 505321221233. The next prime is 505321221289. The reversal of 505321221242 is 242122123505.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 450682626241 + 54638595001 = 671329^2 + 233749^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4210142 + ... + 4328502.

Almost surely, 2^505321221242 is an apocalyptic number.

505321221242 is a deficient number, since it is larger than the sum of its proper divisors (278815192558).

505321221242 is a wasteful number, since it uses less digits than its factorization.

505321221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192001.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 505321221242 its reverse (242122123505), we get a palindrome (747443344747).

The spelling of 505321221242 in words is "five hundred five billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred forty-two".