21241330243 has 8 divisors (see below), whose sum is σ = 24280010240. Its totient is φ = 18203701320.

The previous prime is 21241330241. The next prime is 21241330249. The reversal of 21241330243 is 34203314212.

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

It is not a de Polignac number, because 21241330243 - 2¹ = 21241330241 is a prime.

It is a super-2 number, since 2×21241330243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21241330241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218973 + ... + 300718.

It is an arithmetic number, because the mean of its divisors is an integer number (3035001280).

Almost surely, 2^21241330243 is an apocalyptic number.

21241330243 is a deficient number, since it is larger than the sum of its proper divisors (3038679997).

21241330243 is an equidigital number, since it uses as much as digits as its factorization.

21241330243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525537.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21241330243 its reverse (34203314212), we get a palindrome (55444644455).

The spelling of 21241330243 in words is "twenty-one billion, two hundred forty-one million, three hundred thirty thousand, two hundred forty-three".