21020201110211 has 4 divisors (see below), whose sum is σ = 21078753202800. Its totient is φ = 20961649017624.

The previous prime is 21020201110193. The next prime is 21020201110261. The reversal of 21020201110211 is 11201110202012.

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

It is a cyclic number.

It is not a de Polignac number, because 21020201110211 - 2¹⁸ = 21020200848067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020201110261) 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, 29276045756 + ... + 29276046473.

It is an arithmetic number, because the mean of its divisors is an integer number (5269688300700).

Almost surely, 2^{21020201110211} is an apocalyptic number.

21020201110211 is a deficient number, since it is larger than the sum of its proper divisors (58552092589).

21020201110211 is an equidigital number, since it uses as much as digits as its factorization.

21020201110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58552092588.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21020201110211 its reverse (11201110202012), we get a palindrome (32221311312223).

The spelling of 21020201110211 in words is "twenty-one trillion, twenty billion, two hundred one million, one hundred ten thousand, two hundred eleven".