21330442001 has 16 divisors (see below), whose sum is σ = 23363710080. Its totient is φ = 19312974720.

The previous prime is 21330441967. The next prime is 21330442033. The reversal of 21330442001 is 10024403312.

It is a cyclic number.

It is not a de Polignac number, because 21330442001 - 2¹⁰ = 21330440977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21330442501) 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 15 ways as a sum of consecutive naturals, for example, 6157796 + ... + 6161258.

It is an arithmetic number, because the mean of its divisors is an integer number (1460231880).

Almost surely, 2^21330442001 is an apocalyptic number.

It is an amenable number.

21330442001 is a deficient number, since it is larger than the sum of its proper divisors (2033268079).

21330442001 is a wasteful number, since it uses less digits than its factorization.

21330442001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21330442001 its reverse (10024403312), we get a palindrome (31354845313).

The spelling of 21330442001 in words is "twenty-one billion, three hundred thirty million, four hundred forty-two thousand, one".