21333240001 has 4 divisors (see below), whose sum is σ = 21694820400. Its totient is φ = 20971659604.

The previous prime is 21333239971. The next prime is 21333240011. The reversal of 21333240001 is 10004233312.

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 not a de Polignac number, because 21333240001 - 2⁵ = 21333239969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333240011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180790111 + ... + 180790228.

It is an arithmetic number, because the mean of its divisors is an integer number (5423705100).

Almost surely, 2^21333240001 is an apocalyptic number.

It is an amenable number.

21333240001 is a deficient number, since it is larger than the sum of its proper divisors (361580399).

21333240001 is an equidigital number, since it uses as much as digits as its factorization.

21333240001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361580398.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21333240001 its reverse (10004233312), we get a palindrome (31337473313).

The spelling of 21333240001 in words is "twenty-one billion, three hundred thirty-three million, two hundred forty thousand, one".