311112230220 has 144 divisors (see below), whose sum is σ = 1029676441248. Its totient is φ = 75408122880.

The previous prime is 311112230213. The next prime is 311112230237. The reversal of 311112230220 is 22032211113.

311112230220 is a `hidden beast` number, since 311 + 11 + 22 + 302 + 20 = 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 = 311112230193 and 311112230202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16577082 + ... + 16595838.

It is an arithmetic number, because the mean of its divisors is an integer number (7150530842).

Almost surely, 2^311112230220 is an apocalyptic number.

311112230220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311112230220 is an abundant number, since it is smaller than the sum of its proper divisors (718564211028).

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

311112230220 is a wasteful number, since it uses less digits than its factorization.

311112230220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27160 (or 27155 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 311112230220 its reverse (22032211113), we get a palindrome (333144441333).

The spelling of 311112230220 in words is "three hundred eleven billion, one hundred twelve million, two hundred thirty thousand, two hundred twenty".