2013111311 has 4 divisors (see below), whose sum is σ = 2013420552. Its totient is φ = 2012802072.

The previous prime is 2013111307. The next prime is 2013111323. The reversal of 2013111311 is 1131113102.

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 2013111311 - 2² = 2013111307 is a prime.

It is a super-2 number, since 2×2013111311² = 8105234300952277442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013111301) 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, 144641 + ... + 157946.

It is an arithmetic number, because the mean of its divisors is an integer number (503355138).

Almost surely, 2^2013111311 is an apocalyptic number.

2013111311 is a deficient number, since it is larger than the sum of its proper divisors (309241).

2013111311 is an equidigital number, since it uses as much as digits as its factorization.

2013111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309240.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 2013111311 is about 44867.7090010176. The cubic root of 2013111311 is about 1262.6682581484.

Adding to 2013111311 its reverse (1131113102), we get a palindrome (3144224413).

The spelling of 2013111311 in words is "two billion, thirteen million, one hundred eleven thousand, three hundred eleven".