21020101210211 has 16 divisors (see below), whose sum is σ = 21826343884800. Its totient is φ = 20228337230400.

The previous prime is 21020101210187. The next prime is 21020101210219. The reversal of 21020101210211 is 11201210102012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020101210211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020101210219) 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 15 ways as a sum of consecutive naturals, for example, 242276 + ... + 6488366.

It is an arithmetic number, because the mean of its divisors is an integer number (1364146492800).

Almost surely, 2^{21020101210211} is an apocalyptic number.

21020101210211 is a deficient number, since it is larger than the sum of its proper divisors (806242674589).

21020101210211 is a wasteful number, since it uses less digits than its factorization.

21020101210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247250.

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

Adding to 21020101210211 its reverse (11201210102012), we get a palindrome (32221311312223).

The spelling of 21020101210211 in words is "twenty-one trillion, twenty billion, one hundred one million, two hundred ten thousand, two hundred eleven".