2111011013 has 4 divisors (see below), whose sum is σ = 2111999148. Its totient is φ = 2110022880.

The previous prime is 2111010971. The next prime is 2111011027. The reversal of 2111011013 is 3101101112.

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 1909427809 + 201583204 = 43697^2 + 14198^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111011013 - 2⁸ = 2111010757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111010985 and 2111011003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111011043) 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 3 ways as a sum of consecutive naturals, for example, 490856 + ... + 495137.

It is an arithmetic number, because the mean of its divisors is an integer number (527999787).

Almost surely, 2^2111011013 is an apocalyptic number.

It is an amenable number.

2111011013 is a deficient number, since it is larger than the sum of its proper divisors (988135).

2111011013 is an equidigital number, since it uses as much as digits as its factorization.

2111011013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988134.

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

The square root of 2111011013 is about 45945.7398786873. The cubic root of 2111011013 is about 1282.8134349634.

Adding to 2111011013 its reverse (3101101112), we get a palindrome (5212112125).

Subtracting 2111011013 from its reverse (3101101112), we obtain a palindrome (990090099).

It can be divided in two parts, 21110 and 11013, that added together give a palindrome (32123).

The spelling of 2111011013 in words is "two billion, one hundred eleven million, eleven thousand, thirteen".