311222112112 has 20 divisors (see below), whose sum is σ = 608847144880. Its totient is φ = 154100268288.

The previous prime is 311222112109. The next prime is 311222112121. The reversal of 311222112112 is 211211222113.

It is a self number, because there is not a number n which added to its sum of digits gives 311222112112.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 94422537 + ... + 94425832.

It is an arithmetic number, because the mean of its divisors is an integer number (30442357244).

Almost surely, 2^311222112112 is an apocalyptic number.

It is an amenable number.

311222112112 is a deficient number, since it is larger than the sum of its proper divisors (297625032768).

311222112112 is a wasteful number, since it uses less digits than its factorization.

311222112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188848480 (or 188848474 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 311222112112 its reverse (211211222113), we get a palindrome (522433334225).

The spelling of 311222112112 in words is "three hundred eleven billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twelve".