505122321500042 has 4 divisors (see below), whose sum is σ = 757683482250066. Its totient is φ = 252561160750020.

The previous prime is 505122321500021. The next prime is 505122321500051. The reversal of 505122321500042 is 240005123221505.

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

It can be written as a sum of positive squares in only one way, i.e., 502623712171441 + 2498609328601 = 22419271^2 + 1580699^2 .

It is a junction number, because it is equal to n+sod(n) for n = 505122321499981 and 505122321500008.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126280580375009 + ... + 126280580375012.

Almost surely, 2^{505122321500042} is an apocalyptic number.

505122321500042 is a deficient number, since it is larger than the sum of its proper divisors (252561160750024).

505122321500042 is a wasteful number, since it uses less digits than its factorization.

505122321500042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252561160750023.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 505122321500042 its reverse (240005123221505), we get a palindrome (745127444721547).

The spelling of 505122321500042 in words is "five hundred five trillion, one hundred twenty-two billion, three hundred twenty-one million, five hundred thousand, forty-two".