311312122 has 16 divisors (see below), whose sum is σ = 511090272. Its totient is φ = 141041520.

The previous prime is 311312101. The next prime is 311312171. The reversal of 311312122 is 221213113.

It is a junction number, because it is equal to n+sod(n) for n = 311312096 and 311312105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16293 + ... + 29800.

It is an arithmetic number, because the mean of its divisors is an integer number (31943142).

Almost surely, 2^311312122 is an apocalyptic number.

311312122 is a deficient number, since it is larger than the sum of its proper divisors (199778150).

311312122 is a wasteful number, since it uses less digits than its factorization.

311312122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46413.

The product of its digits is 72, while the sum is 16.

The square root of 311312122 is about 17644.0392767643. The cubic root of 311312122 is about 677.7434731739.

Adding to 311312122 its reverse (221213113), we get a palindrome (532525235).

Subtracting from 311312122 its reverse (221213113), we obtain a palindrome (90099009).

The spelling of 311312122 in words is "three hundred eleven million, three hundred twelve thousand, one hundred twenty-two".