10001200310021 has 4 divisors (see below), whose sum is σ = 10002311440044. Its totient is φ = 10000089180000.

The previous prime is 10001200310011. The next prime is 10001200310033. The reversal of 10001200310021 is 12001300210001.

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 1110599822500 + 8890600487521 = 1053850^2 + 2981711^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001200310021 - 2²² = 10001196115717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001200309984 and 10001200310011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001200310011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555551510 + ... + 555569511.

It is an arithmetic number, because the mean of its divisors is an integer number (2500577860011).

Almost surely, 2^{10001200310021} is an apocalyptic number.

It is an amenable number.

10001200310021 is a deficient number, since it is larger than the sum of its proper divisors (1111130023).

10001200310021 is an equidigital number, since it uses as much as digits as its factorization.

10001200310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111130022.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10001200310021 its reverse (12001300210001), we get a palindrome (22002500520022).

The spelling of 10001200310021 in words is "ten trillion, one billion, two hundred million, three hundred ten thousand, twenty-one".