2013111211 has 4 divisors (see below), whose sum is σ = 2047231800. Its totient is φ = 1978990624.

The previous prime is 2013111187. The next prime is 2013111229. The reversal of 2013111211 is 1121113102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2013111211 - 2¹³ = 2013103019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013111191 and 2013111200.

It is not an unprimeable number, because it can be changed into a prime (2013121211) 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, 17060206 + ... + 17060323.

It is an arithmetic number, because the mean of its divisors is an integer number (511807950).

Almost surely, 2^2013111211 is an apocalyptic number.

2013111211 is a deficient number, since it is larger than the sum of its proper divisors (34120589).

2013111211 is an equidigital number, since it uses as much as digits as its factorization.

2013111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34120588.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2013111211 is about 44867.7078866304. The cubic root of 2013111211 is about 1262.6682372410.

Adding to 2013111211 its reverse (1121113102), we get a palindrome (3134224313).

The spelling of 2013111211 in words is "two billion, thirteen million, one hundred eleven thousand, two hundred eleven".