21204302241 has 8 divisors (see below), whose sum is σ = 28694379424. Its totient is φ = 13925213280.

The previous prime is 21204302239. The next prime is 21204302261. The reversal of 21204302241 is 14220340212.

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

It is not a de Polignac number, because 21204302241 - 2¹ = 21204302239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21204302261) 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, 52746820 + ... + 52747221.

It is an arithmetic number, because the mean of its divisors is an integer number (3586797428).

Almost surely, 2^21204302241 is an apocalyptic number.

It is an amenable number.

21204302241 is a deficient number, since it is larger than the sum of its proper divisors (7490077183).

21204302241 is a wasteful number, since it uses less digits than its factorization.

21204302241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105494111.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21204302241 its reverse (14220340212), we get a palindrome (35424642453).

The spelling of 21204302241 in words is "twenty-one billion, two hundred four million, three hundred two thousand, two hundred forty-one".