21013330001 has 4 divisors (see below), whose sum is σ = 21279321600. Its totient is φ = 20747338404.

The previous prime is 21013329937. The next prime is 21013330021. The reversal of 21013330001 is 10003331012.

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 21013330001 - 2⁶ = 21013329937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21013330021) 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, 132995681 + ... + 132995838.

It is an arithmetic number, because the mean of its divisors is an integer number (5319830400).

Almost surely, 2^21013330001 is an apocalyptic number.

It is an amenable number.

21013330001 is a deficient number, since it is larger than the sum of its proper divisors (265991599).

21013330001 is an equidigital number, since it uses as much as digits as its factorization.

21013330001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265991598.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21013330001 its reverse (10003331012), we get a palindrome (31016661013).

The spelling of 21013330001 in words is "twenty-one billion, thirteen million, three hundred thirty thousand, one".