21003001200001 has 4 divisors (see below), whose sum is σ = 21012209006404. Its totient is φ = 20993793393600.

The previous prime is 21003001199993. The next prime is 21003001200011. The reversal of 21003001200001 is 10000210030012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16712365381776 + 4290635818225 = 4088076^2 + 2071385^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003001200001 - 2³ = 21003001199993 is a prime.

It is a super-2 number, since 2×21003001200001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003001200011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4603899780 + ... + 4603904341.

It is an arithmetic number, because the mean of its divisors is an integer number (5253052251601).

Almost surely, 2^{21003001200001} is an apocalyptic number.

It is an amenable number.

21003001200001 is a deficient number, since it is larger than the sum of its proper divisors (9207806403).

21003001200001 is an equidigital number, since it uses as much as digits as its factorization.

21003001200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9207806402.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21003001200001 its reverse (10000210030012), we get a palindrome (31003211230013).

The spelling of 21003001200001 in words is "twenty-one trillion, three billion, one million, two hundred thousand, one".