1111211113211 has 4 divisors (see below), whose sum is σ = 1147056633024. Its totient is φ = 1075365593400.

The previous prime is 1111211113163. The next prime is 1111211113223. The reversal of 1111211113211 is 1123111121111.

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-1111211113211 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 1111211113211.

It is not an unprimeable number, because it can be changed into a prime (1111211113511) 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, 17922759860 + ... + 17922759921.

It is an arithmetic number, because the mean of its divisors is an integer number (286764158256).

Almost surely, 2^{1111211113211} is an apocalyptic number.

1111211113211 is a deficient number, since it is larger than the sum of its proper divisors (35845519813).

1111211113211 is an equidigital number, since it uses as much as digits as its factorization.

1111211113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35845519812.

The product of its digits is 12, while the sum is 17.

Adding to 1111211113211 its reverse (1123111121111), we get a palindrome (2234322234322).

The spelling of 1111211113211 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred thirteen thousand, two hundred eleven".