111211343111 has 16 divisors (see below), whose sum is σ = 126064490496. Its totient is φ = 97191900000.

The previous prime is 111211343093. The next prime is 111211343123. The reversal of 111211343111 is 111343112111.

It is a cyclic number.

It is not a de Polignac number, because 111211343111 - 2¹⁰ = 111211342087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211343141) 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, 1028420 + ... + 1131401.

It is an arithmetic number, because the mean of its divisors is an integer number (7879030656).

Almost surely, 2^111211343111 is an apocalyptic number.

111211343111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111211343111 is a deficient number, since it is larger than the sum of its proper divisors (14853147385).

111211343111 is a wasteful number, since it uses less digits than its factorization.

111211343111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160014.

The product of its digits is 72, while the sum is 20.

Adding to 111211343111 its reverse (111343112111), we get a palindrome (222554455222).

The spelling of 111211343111 in words is "one hundred eleven billion, two hundred eleven million, three hundred forty-three thousand, one hundred eleven".