21241324001 has 4 divisors (see below), whose sum is σ = 21510201600. Its totient is φ = 20972446404.

The previous prime is 21241323979. The next prime is 21241324003. The reversal of 21241324001 is 10042314212.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21241324001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21241324003) 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, 134438681 + ... + 134438838.

It is an arithmetic number, because the mean of its divisors is an integer number (5377550400).

Almost surely, 2^21241324001 is an apocalyptic number.

It is an amenable number.

21241324001 is a deficient number, since it is larger than the sum of its proper divisors (268877599).

21241324001 is an equidigital number, since it uses as much as digits as its factorization.

21241324001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268877598.

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

Adding to 21241324001 its reverse (10042314212), we get a palindrome (31283638213).

The spelling of 21241324001 in words is "twenty-one billion, two hundred forty-one million, three hundred twenty-four thousand, one".