20101211210211 has 16 divisors (see below), whose sum is σ = 26849991522816. Its totient is φ = 13376639043936.

The previous prime is 20101211210207. The next prime is 20101211210261. The reversal of 20101211210211 is 11201211210102.

It is a happy number.

It is not a de Polignac number, because 20101211210211 - 2² = 20101211210207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101211210261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1569816 + ... + 6531978.

It is an arithmetic number, because the mean of its divisors is an integer number (1678124470176).

Almost surely, 2^{20101211210211} is an apocalyptic number.

20101211210211 is a deficient number, since it is larger than the sum of its proper divisors (6748780312605).

20101211210211 is a wasteful number, since it uses less digits than its factorization.

20101211210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964602.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20101211210211 its reverse (11201211210102), we get a palindrome (31302422420313).

The spelling of 20101211210211 in words is "twenty trillion, one hundred one billion, two hundred eleven million, two hundred ten thousand, two hundred eleven".