2120211211 has 4 divisors (see below), whose sum is σ = 2139662800. Its totient is φ = 2100759624.

The previous prime is 2120211169. The next prime is 2120211239. The reversal of 2120211211 is 1121120212.

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 2120211211 - 2⁹ = 2120210699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120211191 and 2120211200.

It is not an unprimeable number, because it can be changed into a prime (2120211281) 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, 9725631 + ... + 9725848.

It is an arithmetic number, because the mean of its divisors is an integer number (534915700).

Almost surely, 2^2120211211 is an apocalyptic number.

2120211211 is a deficient number, since it is larger than the sum of its proper divisors (19451589).

2120211211 is a wasteful number, since it uses less digits than its factorization.

2120211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19451588.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2120211211 is about 46045.7512806556. The cubic root of 2120211211 is about 1284.6743179840.

Adding to 2120211211 its reverse (1121120212), we get a palindrome (3241331423).

Subtracting from 2120211211 its reverse (1121120212), we obtain a palindrome (999090999).

The spelling of 2120211211 in words is "two billion, one hundred twenty million, two hundred eleven thousand, two hundred eleven".