2120221211 has 4 divisors (see below), whose sum is σ = 2121083112. Its totient is φ = 2119359312.

The previous prime is 2120221199. The next prime is 2120221261. The reversal of 2120221211 is 1121220212.

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 2120221211 - 2¹⁰ = 2120220187 is a prime.

It is a super-3 number, since 3×2120221211³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120221261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427250 + ... + 432183.

It is an arithmetic number, because the mean of its divisors is an integer number (530270778).

Almost surely, 2^2120221211 is an apocalyptic number.

2120221211 is a deficient number, since it is larger than the sum of its proper divisors (861901).

2120221211 is an equidigital number, since it uses as much as digits as its factorization.

2120221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861900.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2120221211 is about 46045.8598681792. The cubic root of 2120221211 is about 1284.6763377078.

Adding to 2120221211 its reverse (1121220212), we get a palindrome (3241441423).

Subtracting from 2120221211 its reverse (1121220212), we obtain a palindrome (999000999).

The spelling of 2120221211 in words is "two billion, one hundred twenty million, two hundred twenty-one thousand, two hundred eleven".