21241304210 has 64 divisors (see below), whose sum is σ = 44474137344. Its totient is φ = 7153920000.

The previous prime is 21241304207. The next prime is 21241304213. The reversal of 21241304210 is 1240314212.

It is an interprime number because it is at equal distance from previous prime (21241304207) and next prime (21241304213).

It is not an unprimeable number, because it can be changed into a prime (21241304213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1274330 + ... + 1290890.

It is an arithmetic number, because the mean of its divisors is an integer number (694908396).

Almost surely, 2^21241304210 is an apocalyptic number.

21241304210 is an abundant number, since it is smaller than the sum of its proper divisors (23232833134).

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

21241304210 is a wasteful number, since it uses less digits than its factorization.

21241304210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16899.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21241304210 its reverse (1240314212), we get a palindrome (22481618422).

The spelling of 21241304210 in words is "twenty-one billion, two hundred forty-one million, three hundred four thousand, two hundred ten".