311021120112 has 40 divisors (see below), whose sum is σ = 803513762304. Its totient is φ = 103668218304.

The previous prime is 311021120099. The next prime is 311021120143. The reversal of 311021120112 is 211021120113.

It is a junction number, because it is equal to n+sod(n) for n = 311021120091 and 311021120100.

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 7 ways as a sum of consecutive naturals, for example, 801543 + ... + 1124505.

Almost surely, 2^311021120112 is an apocalyptic number.

It is an amenable number.

311021120112 is an abundant number, since it is smaller than the sum of its proper divisors (492492642192).

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

311021120112 is a wasteful number, since it uses less digits than its factorization.

311021120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343037 (or 343031 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 311021120112 its reverse (211021120113), we get a palindrome (522042240225).

Subtracting from 311021120112 its reverse (211021120113), we obtain a palindrome (99999999999).

The spelling of 311021120112 in words is "three hundred eleven billion, twenty-one million, one hundred twenty thousand, one hundred twelve".