21010010200001 has 4 divisors (see below), whose sum is σ = 21010078355904. Its totient is φ = 21009942044100.

The previous prime is 21010010199991. The next prime is 21010010200007. The reversal of 21010010200001 is 10000201001012.

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 21010010200001 - 2²² = 21010006005697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010010200007) 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, 33613445 + ... + 34232786.

It is an arithmetic number, because the mean of its divisors is an integer number (5252519588976).

Almost surely, 2^{21010010200001} is an apocalyptic number.

It is an amenable number.

21010010200001 is a deficient number, since it is larger than the sum of its proper divisors (68155903).

21010010200001 is an equidigital number, since it uses as much as digits as its factorization.

21010010200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68155902.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21010010200001 its reverse (10000201001012), we get a palindrome (31010211201013).

The spelling of 21010010200001 in words is "twenty-one trillion, ten billion, ten million, two hundred thousand, one".