21002324241 has 4 divisors (see below), whose sum is σ = 28003098992. Its totient is φ = 14001549492.

The previous prime is 21002324227. The next prime is 21002324243. The reversal of 21002324241 is 14242320012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21002324241 - 2⁵ = 21002324209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002324243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3500387371 + ... + 3500387376.

It is an arithmetic number, because the mean of its divisors is an integer number (7000774748).

Almost surely, 2^21002324241 is an apocalyptic number.

It is an amenable number.

21002324241 is a deficient number, since it is larger than the sum of its proper divisors (7000774751).

21002324241 is an equidigital number, since it uses as much as digits as its factorization.

21002324241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000774750.

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

Adding to 21002324241 its reverse (14242320012), we get a palindrome (35244644253).

The spelling of 21002324241 in words is "twenty-one billion, two million, three hundred twenty-four thousand, two hundred forty-one".