2211211211 has 4 divisors (see below), whose sum is σ = 2412230424. Its totient is φ = 2010192000.

The previous prime is 2211211201. The next prime is 2211211253. The reversal of 2211211211 is 1121121122.

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 2211211211 - 2⁶ = 2211211147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211211201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100509590 + ... + 100509611.

It is an arithmetic number, because the mean of its divisors is an integer number (603057606).

Almost surely, 2^2211211211 is an apocalyptic number.

2211211211 is a deficient number, since it is larger than the sum of its proper divisors (201019213).

2211211211 is a wasteful number, since it uses less digits than its factorization.

2211211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201019212.

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

The square root of 2211211211 is about 47023.5176374546. The cubic root of 2211211211 is about 1302.7969781225.

Adding to 2211211211 its reverse (1121121122), we get a palindrome (3332332333).

It can be divided in two parts, 221121121 and 1, that added together give a palindrome (221121122).

The spelling of 2211211211 in words is "two billion, two hundred eleven million, two hundred eleven thousand, two hundred eleven".