311021112222 has 48 divisors (see below), whose sum is σ = 692764836192. Its totient is φ = 100773650880.

The previous prime is 311021112179. The next prime is 311021112223. The reversal of 311021112222 is 222211120113.

311021112222 is a `hidden beast` number, since 311 + 0 + 21 + 112 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 311021112195 and 311021112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311021112223) 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 23 ways as a sum of consecutive naturals, for example, 460168 + ... + 913124.

It is an arithmetic number, because the mean of its divisors is an integer number (14432600754).

Almost surely, 2^311021112222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311021112222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346382418096).

311021112222 is an abundant number, since it is smaller than the sum of its proper divisors (381743723970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311021112222 is a wasteful number, since it uses less digits than its factorization.

311021112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454033 (or 454030 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 311021112222 its reverse (222211120113), we get a palindrome (533232232335).

The spelling of 311021112222 in words is "three hundred eleven billion, twenty-one million, one hundred twelve thousand, two hundred twenty-two".