11311311111 has 16 divisors (see below), whose sum is σ = 15304907520. Its totient is φ = 7429443840.

The previous prime is 11311311103. The next prime is 11311311203. The reversal of 11311311111 is 11111311311.

It is not a de Polignac number, because 11311311111 - 2³ = 11311311103 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311311511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297975 + ... + 333783.

It is an arithmetic number, because the mean of its divisors is an integer number (956556720).

Almost surely, 2^11311311111 is an apocalyptic number.

11311311111 is a deficient number, since it is larger than the sum of its proper divisors (3993596409).

11311311111 is a wasteful number, since it uses less digits than its factorization.

11311311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37366.

The product of its digits is 9, while the sum is 15.

Adding to 11311311111 its reverse (11111311311), we get a palindrome (22422622422).

It can be divided in two parts, 11311311 and 111, that multiplied together give a palindrome (1255555521).

The spelling of 11311311111 in words is "eleven billion, three hundred eleven million, three hundred eleven thousand, one hundred eleven".