505220122042 has 4 divisors (see below), whose sum is σ = 757830183066. Its totient is φ = 252610061020.

The previous prime is 505220121983. The next prime is 505220122081. The reversal of 505220122042 is 240221022505.

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., 371198966121 + 134021155921 = 609261^2 + 366089^2 .

It is a super-2 number, since 2×505220122042² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505220121998 and 505220122016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126305030509 + ... + 126305030512.

Almost surely, 2^505220122042 is an apocalyptic number.

505220122042 is a deficient number, since it is larger than the sum of its proper divisors (252610061024).

505220122042 is a wasteful number, since it uses less digits than its factorization.

505220122042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252610061023.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 505220122042 its reverse (240221022505), we get a palindrome (745441144547).

The spelling of 505220122042 in words is "five hundred five billion, two hundred twenty million, one hundred twenty-two thousand, forty-two".