11313121111 has 2 divisors, whose sum is σ = 11313121112. Its totient is φ = 11313121110.

The previous prime is 11313121109. The next prime is 11313121139. The reversal of 11313121111 is 11112131311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11313121111 - 2¹ = 11313121109 is a prime.

Together with 11313121109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11613121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656560555 + 5656560556.

It is an arithmetic number, because the mean of its divisors is an integer number (5656560556).

Almost surely, 2^11313121111 is an apocalyptic number.

11313121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11313121111 is an equidigital number, since it uses as much as digits as its factorization.

11313121111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18, while the sum is 16.

Adding to 11313121111 its reverse (11112131311), we get a palindrome (22425252422).

The spelling of 11313121111 in words is "eleven billion, three hundred thirteen million, one hundred twenty-one thousand, one hundred eleven".