21120204241 has 8 divisors (see below), whose sum is σ = 21809700864. Its totient is φ = 20431220160.

The previous prime is 21120204239. The next prime is 21120204257. The reversal of 21120204241 is 14240202112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21120204241 - 2¹ = 21120204239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120204211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43480 + ... + 210073.

It is an arithmetic number, because the mean of its divisors is an integer number (2726212608).

Almost surely, 2^21120204241 is an apocalyptic number.

It is an amenable number.

21120204241 is a deficient number, since it is larger than the sum of its proper divisors (689496623).

21120204241 is a wasteful number, since it uses less digits than its factorization.

21120204241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256271.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21120204241 its reverse (14240202112), we get a palindrome (35360406353).

The spelling of 21120204241 in words is "twenty-one billion, one hundred twenty million, two hundred four thousand, two hundred forty-one".