204212121212442 has 48 divisors (see below), whose sum is σ = 475107479521632. Its totient is φ = 58346108120160.

The previous prime is 204212121212339. The next prime is 204212121212479. The reversal of 204212121212442 is 244212121212402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91190017 + ... + 93402587.

It is an arithmetic number, because the mean of its divisors is an integer number (9898072490034).

Almost surely, 2^{204212121212442} is an apocalyptic number.

204212121212442 is an abundant number, since it is smaller than the sum of its proper divisors (270895358309190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204212121212442 is a wasteful number, since it uses less digits than its factorization.

204212121212442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526523 (or 2526516 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

Adding to 204212121212442 its reverse (244212121212402), we get a palindrome (448424242424844).

The spelling of 204212121212442 in words is "two hundred four trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, four hundred forty-two".