1112211311 has 4 divisors (see below), whose sum is σ = 1112383800. Its totient is φ = 1112038824.

The previous prime is 1112211259. The next prime is 1112211313. The reversal of 1112211311 is 1131122111.

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-1112211311 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 (1112211313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76181 + ... + 89598.

It is an arithmetic number, because the mean of its divisors is an integer number (278095950).

Almost surely, 2^1112211311 is an apocalyptic number.

1112211311 is a deficient number, since it is larger than the sum of its proper divisors (172489).

1112211311 is an equidigital number, since it uses as much as digits as its factorization.

1112211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172488.

The product of its digits is 12, while the sum is 14.

The square root of 1112211311 is about 33349.8322484537. The cubic root of 1112211311 is about 1036.0859135656.

Adding to 1112211311 its reverse (1131122111), we get a palindrome (2243333422).

The spelling of 1112211311 in words is "one billion, one hundred twelve million, two hundred eleven thousand, three hundred eleven".