2120211211211 has 4 divisors (see below), whose sum is σ = 2120245690152. Its totient is φ = 2120176732272.

The previous prime is 2120211211177. The next prime is 2120211211229. The reversal of 2120211211211 is 1121121120212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120211211211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120211211211.

It is not an unprimeable number, because it can be changed into a prime (2120211211241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17147066 + ... + 17270271.

It is an arithmetic number, because the mean of its divisors is an integer number (530061422538).

Almost surely, 2^{2120211211211} is an apocalyptic number.

2120211211211 is a deficient number, since it is larger than the sum of its proper divisors (34478941).

2120211211211 is an equidigital number, since it uses as much as digits as its factorization.

2120211211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34478940.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2120211211211 its reverse (1121121120212), we get a palindrome (3241332331423).

Subtracting from 2120211211211 its reverse (1121121120212), we obtain a palindrome (999090090999).

The spelling of 2120211211211 in words is "two trillion, one hundred twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred eleven".