2011320012 has 144 divisors (see below), whose sum is σ = 5461532160. Its totient is φ = 571100544.

The previous prime is 2011319987. The next prime is 2011320029. The reversal of 2011320012 is 2100231102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2011320012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5480253 + ... + 5480619.

Almost surely, 2^2011320012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011320012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2730766080).

2011320012 is an abundant number, since it is smaller than the sum of its proper divisors (3450212148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011320012 is a wasteful number, since it uses less digits than its factorization.

2011320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2011320012 is about 44847.7425518833. The cubic root of 2011320012 is about 1262.2936327987.

Adding to 2011320012 its reverse (2100231102), we get a palindrome (4111551114).

The spelling of 2011320012 in words is "two billion, eleven million, three hundred twenty thousand, twelve".