204221434222042 has 4 divisors (see below), whose sum is σ = 306332151333066. Its totient is φ = 102110717111020.

The previous prime is 204221434222037. The next prime is 204221434222073. The reversal of 204221434222042 is 240222434122402.

204221434222042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 190609474087321 + 13611960134721 = 13806139^2 + 3689439^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204221434221989 and 204221434222007.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055358555509 + ... + 51055358555512.

Almost surely, 2^{204221434222042} is an apocalyptic number.

204221434222042 is a deficient number, since it is larger than the sum of its proper divisors (102110717111024).

204221434222042 is a wasteful number, since it uses less digits than its factorization.

204221434222042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102110717111023.

The product of its (nonzero) digits is 98304, while the sum is 34.

Adding to 204221434222042 its reverse (240222434122402), we get a palindrome (444443868344444).

The spelling of 204221434222042 in words is "two hundred four trillion, two hundred twenty-one billion, four hundred thirty-four million, two hundred twenty-two thousand, forty-two".