2111320445 has 16 divisors (see below), whose sum is σ = 2729500032. Its totient is φ = 1558543680.

The previous prime is 2111320433. The next prime is 2111320447. The reversal of 2111320445 is 5440231112.

It is not a de Polignac number, because 2111320445 - 2⁴ = 2111320429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111320445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111320447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251384 + ... + 259646.

It is an arithmetic number, because the mean of its divisors is an integer number (170593752).

Almost surely, 2^2111320445 is an apocalyptic number.

It is an amenable number.

2111320445 is a deficient number, since it is larger than the sum of its proper divisors (618179587).

2111320445 is a wasteful number, since it uses less digits than its factorization.

2111320445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2111320445 is about 45949.1071186372. The cubic root of 2111320445 is about 1282.8761101667.

Adding to 2111320445 its reverse (5440231112), we get a palindrome (7551551557).

The spelling of 2111320445 in words is "two billion, one hundred eleven million, three hundred twenty thousand, four hundred forty-five".