20011021210211 has 16 divisors (see below), whose sum is σ = 20184154485600. Its totient is φ = 19838508139008.

The previous prime is 20011021210183. The next prime is 20011021210241. The reversal of 20011021210211 is 11201212011002.

It is a cyclic number.

It is not a de Polignac number, because 20011021210211 - 2¹⁸ = 20011020948067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011021210241) 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, 150858905 + ... + 150991493.

It is an arithmetic number, because the mean of its divisors is an integer number (1261509655350).

Almost surely, 2^{20011021210211} is an apocalyptic number.

20011021210211 is a deficient number, since it is larger than the sum of its proper divisors (173133275389).

20011021210211 is a wasteful number, since it uses less digits than its factorization.

20011021210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134918.

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

Adding to 20011021210211 its reverse (11201212011002), we get a palindrome (31212233221213).

The spelling of 20011021210211 in words is "twenty trillion, eleven billion, twenty-one million, two hundred ten thousand, two hundred eleven".