204212404042 has 4 divisors (see below), whose sum is σ = 306318606066. Its totient is φ = 102106202020.

The previous prime is 204212404037. The next prime is 204212404061. The reversal of 204212404042 is 240404212402.

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., 204104264841 + 108139201 = 451779^2 + 10399^2 .

It is a super-2 number, since 2×204212404042² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204212403998 and 204212404016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51053101009 + ... + 51053101012.

Almost surely, 2^204212404042 is an apocalyptic number.

204212404042 is a deficient number, since it is larger than the sum of its proper divisors (102106202024).

204212404042 is a wasteful number, since it uses less digits than its factorization.

204212404042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102106202023.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 204212404042 its reverse (240404212402), we get a palindrome (444616616444).

The spelling of 204212404042 in words is "two hundred four billion, two hundred twelve million, four hundred four thousand, forty-two".