21333424201 has 4 divisors (see below), whose sum is σ = 21336502032. Its totient is φ = 21330346372.

The previous prime is 21333424187. The next prime is 21333424207. The reversal of 21333424201 is 10242433312.

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 21333424201 - 2¹³ = 21333416009 is a prime.

It is a super-2 number, since 2×21333424201² (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 (21333424207) 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 3 ways as a sum of consecutive naturals, for example, 1528495 + ... + 1542388.

It is an arithmetic number, because the mean of its divisors is an integer number (5334125508).

Almost surely, 2^21333424201 is an apocalyptic number.

It is an amenable number.

21333424201 is a deficient number, since it is larger than the sum of its proper divisors (3077831).

21333424201 is an equidigital number, since it uses as much as digits as its factorization.

21333424201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077830.

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

Adding to 21333424201 its reverse (10242433312), we get a palindrome (31575857513).

The spelling of 21333424201 in words is "twenty-one billion, three hundred thirty-three million, four hundred twenty-four thousand, two hundred one".