2211221311 has 16 divisors (see below), whose sum is σ = 2615639040. Its totient is φ = 1849620960.

The previous prime is 2211221279. The next prime is 2211221317. The reversal of 2211221311 is 1131221122.

It is a cyclic number.

It is not a de Polignac number, because 2211221311 - 2⁵ = 2211221279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211221317) 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, 188935 + ... + 200296.

It is an arithmetic number, because the mean of its divisors is an integer number (163477440).

Almost surely, 2^2211221311 is an apocalyptic number.

2211221311 is a deficient number, since it is larger than the sum of its proper divisors (404417729).

2211221311 is a wasteful number, since it uses less digits than its factorization.

2211221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389286.

The product of its digits is 48, while the sum is 16.

The square root of 2211221311 is about 47023.6250304036. The cubic root of 2211221311 is about 1302.7989616854.

Adding to 2211221311 its reverse (1131221122), we get a palindrome (3342442433).

The spelling of 2211221311 in words is "two billion, two hundred eleven million, two hundred twenty-one thousand, three hundred eleven".