2111321311 has 16 divisors (see below), whose sum is σ = 2315342880. Its totient is φ = 1909348480.

The previous prime is 2111321297. The next prime is 2111321321. The reversal of 2111321311 is 1131231112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2111321311 - 2¹⁷ = 2111190239 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 (2111321321) 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, 3118305 + ... + 3118981.

It is an arithmetic number, because the mean of its divisors is an integer number (144708930).

Almost surely, 2^2111321311 is an apocalyptic number.

2111321311 is a deficient number, since it is larger than the sum of its proper divisors (204021569).

2111321311 is a wasteful number, since it uses less digits than its factorization.

2111321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754.

The product of its digits is 36, while the sum is 16.

The square root of 2111321311 is about 45949.1165421056. The cubic root of 2111321311 is about 1282.8762855658.

Adding to 2111321311 its reverse (1131231112), we get a palindrome (3242552423).

It can be divided in two parts, 21113 and 21311, that added together give a palindrome (42424).

The spelling of 2111321311 in words is "two billion, one hundred eleven million, three hundred twenty-one thousand, three hundred eleven".