1123311211 has 4 divisors (see below), whose sum is σ = 1225430424. Its totient is φ = 1021192000.

The previous prime is 1123311187. The next prime is 1123311221. The reversal of 1123311211 is 1121133211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1123311211 - 2¹¹ = 1123309163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123311221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51059590 + ... + 51059611.

It is an arithmetic number, because the mean of its divisors is an integer number (306357606).

Almost surely, 2^1123311211 is an apocalyptic number.

1123311211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123311211 is a deficient number, since it is larger than the sum of its proper divisors (102119213).

1123311211 is a wasteful number, since it uses less digits than its factorization.

1123311211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102119212.

The product of its digits is 36, while the sum is 16.

The square root of 1123311211 is about 33515.8352275458. The cubic root of 1123311211 is about 1039.5212327260.

Adding to 1123311211 its reverse (1121133211), we get a palindrome (2244444422).

The spelling of 1123311211 in words is "one billion, one hundred twenty-three million, three hundred eleven thousand, two hundred eleven".