2013121111 has 2 divisors, whose sum is σ = 2013121112. Its totient is φ = 2013121110.

The previous prime is 2013121087. The next prime is 2013121151. The reversal of 2013121111 is 1111213102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2013121111 - 2¹¹ = 2013119063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2013121091 and 2013121100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013121151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006560555 + 1006560556.

It is an arithmetic number, because the mean of its divisors is an integer number (1006560556).

Almost surely, 2^2013121111 is an apocalyptic number.

2013121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013121111 is an equidigital number, since it uses as much as digits as its factorization.

2013121111 is an evil number, because the sum of its binary digits is even.

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

The square root of 2013121111 is about 44867.8182108290. The cubic root of 2013121111 is about 1262.6703070712.

Adding to 2013121111 its reverse (1111213102), we get a palindrome (3124334213).

The spelling of 2013121111 in words is "two billion, thirteen million, one hundred twenty-one thousand, one hundred eleven".