21010200000201 has 8 divisors (see below), whose sum is σ = 31126222222560. Its totient is φ = 14006800000116.

The previous prime is 21010200000173. The next prime is 21010200000227. The reversal of 21010200000201 is 10200000201012.

It is not a de Polignac number, because 21010200000201 - 2¹⁵ = 21010199967433 is a prime.

It is a super-2 number, since 2×21010200000201² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (21010200000401) 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 7 ways as a sum of consecutive naturals, for example, 389077777755 + ... + 389077777808.

It is an arithmetic number, because the mean of its divisors is an integer number (3890777777820).

Almost surely, 2^{21010200000201} is an apocalyptic number.

It is an amenable number.

21010200000201 is a deficient number, since it is larger than the sum of its proper divisors (10116022222359).

21010200000201 is an equidigital number, since it uses as much as digits as its factorization.

21010200000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778155555572 (or 778155555566 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21010200000201 its reverse (10200000201012), we get a palindrome (31210200201213).

The spelling of 21010200000201 in words is "twenty-one trillion, ten billion, two hundred million, two hundred one", and thus it is an aban number.