311122 has 16 divisors (see below), whose sum is σ = 542592. Its totient is φ = 131040.

The previous prime is 311111. The next prime is 311123. The reversal of 311122 is 221113.

It is a junction number, because it is equal to n+sod(n) for n = 311099 and 311108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311123) by changing a digit.

311122 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838 + ... + 1150.

It is an arithmetic number, because the mean of its divisors is an integer number (33912).

2³¹¹¹²² is an apocalyptic number.

311122 is a deficient number, since it is larger than the sum of its proper divisors (231470).

311122 is a wasteful number, since it uses less digits than its factorization.

311122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its digits is 12, while the sum is 10.

The square root of 311122 is about 557.7831119710. The cubic root of 311122 is about 67.7605476423.

Adding to 311122 its reverse (221113), we get a palindrome (532235).

Subtracting from 311122 its reverse (221113), we obtain a palindrome (90009).

The spelling of 311122 in words is "three hundred eleven thousand, one hundred twenty-two", and thus it is an iban number.