311123030020 has 48 divisors (see below), whose sum is σ = 717882379200. Its totient is φ = 112321710720.

The previous prime is 311123029991. The next prime is 311123030033. The reversal of 311123030020 is 20030321113.

It is a junction number, because it is equal to n+sod(n) for n = 311123029976 and 311123030003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5056455 + ... + 5117614.

It is an arithmetic number, because the mean of its divisors is an integer number (14955882900).

Almost surely, 2^311123030020 is an apocalyptic number.

It is an amenable number.

311123030020 is an abundant number, since it is smaller than the sum of its proper divisors (406759349180).

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

311123030020 is a wasteful number, since it uses less digits than its factorization.

311123030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10174228 (or 10174226 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 311123030020 its reverse (20030321113), we get a palindrome (331153351133).

The spelling of 311123030020 in words is "three hundred eleven billion, one hundred twenty-three million, thirty thousand, twenty".