21003330001 has 8 divisors (see below), whose sum is σ = 21215484360. Its totient is φ = 20791636992.

The previous prime is 21003329993. The next prime is 21003330013. The reversal of 21003330001 is 10003330012.

It can be written as a sum of positive squares in 4 ways, for example, as 3940700625 + 17062629376 = 62775^2 + 130624^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21003330001 - 2³ = 21003329993 is a prime.

It is a super-2 number, since 2×21003330001² (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 (21003330031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23460 + ... + 206293.

It is an arithmetic number, because the mean of its divisors is an integer number (2651935545).

Almost surely, 2^21003330001 is an apocalyptic number.

It is an amenable number.

21003330001 is a deficient number, since it is larger than the sum of its proper divisors (212154359).

21003330001 is a wasteful number, since it uses less digits than its factorization.

21003330001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230675.

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 21003330001 its reverse (10003330012), we get a palindrome (31006660013).

The spelling of 21003330001 in words is "twenty-one billion, three million, three hundred thirty thousand, one".