2011111013 has 4 divisors (see below), whose sum is σ = 2044080108. Its totient is φ = 1978141920.

The previous prime is 2011111001. The next prime is 2011111043. The reversal of 2011111013 is 3101111102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 874207489 + 1136903524 = 29567^2 + 33718^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011111013 - 2⁶ = 2011110949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011110985 and 2011111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011111043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16484456 + ... + 16484577.

It is an arithmetic number, because the mean of its divisors is an integer number (511020027).

Almost surely, 2^2011111013 is an apocalyptic number.

It is an amenable number.

2011111013 is a deficient number, since it is larger than the sum of its proper divisors (32969095).

2011111013 is an equidigital number, since it uses as much as digits as its factorization.

2011111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32969094.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 2011111013 is about 44845.4123963645. The cubic root of 2011111013 is about 1262.2499090677.

Adding to 2011111013 its reverse (3101111102), we get a palindrome (5112222115).

The spelling of 2011111013 in words is "two billion, eleven million, one hundred eleven thousand, thirteen".