20001210211 has 4 divisors (see below), whose sum is σ = 20225943000. Its totient is φ = 19776477424.

The previous prime is 20001210191. The next prime is 20001210239. The reversal of 20001210211 is 11201210002.

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 20001210211 - 2⁵ = 20001210179 is a prime.

It is a super-2 number, since 2×20001210211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001210241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112366261 + ... + 112366438.

It is an arithmetic number, because the mean of its divisors is an integer number (5056485750).

Almost surely, 2^20001210211 is an apocalyptic number.

20001210211 is a deficient number, since it is larger than the sum of its proper divisors (224732789).

20001210211 is an equidigital number, since it uses as much as digits as its factorization.

20001210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224732788.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20001210211 its reverse (11201210002), we get a palindrome (31202420213).

The spelling of 20001210211 in words is "twenty billion, one million, two hundred ten thousand, two hundred eleven".