111312103211 has 4 divisors (see below), whose sum is σ = 111480503424. Its totient is φ = 111143703000.

The previous prime is 111312103183. The next prime is 111312103219. The reversal of 111312103211 is 112301213111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111312103211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111312103211.

It is not an unprimeable number, because it can be changed into a prime (111312103219) 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, 84199115 + ... + 84200436.

It is an arithmetic number, because the mean of its divisors is an integer number (27870125856).

Almost surely, 2^111312103211 is an apocalyptic number.

111312103211 is a deficient number, since it is larger than the sum of its proper divisors (168400213).

111312103211 is an equidigital number, since it uses as much as digits as its factorization.

111312103211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168400212.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111312103211 its reverse (112301213111), we get a palindrome (223613316322).

The spelling of 111312103211 in words is "one hundred eleven billion, three hundred twelve million, one hundred three thousand, two hundred eleven".