311303122020 has 120 divisors (see below), whose sum is σ = 1065348523008. Its totient is φ = 75467419200.

The previous prime is 311303122003. The next prime is 311303122033. The reversal of 311303122020 is 20221303113.

311303122020 is a `hidden beast` number, since 311 + 3 + 0 + 312 + 20 + 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 = 311303121984 and 311303122002.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8716836 + ... + 8752475.

Almost surely, 2^311303122020 is an apocalyptic number.

311303122020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311303122020 is an abundant number, since it is smaller than the sum of its proper divisors (754045400988).

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

311303122020 is a wasteful number, since it uses less digits than its factorization.

311303122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17469343 (or 17469332 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 311303122020 its reverse (20221303113), we get a palindrome (331524425133).

The spelling of 311303122020 in words is "three hundred eleven billion, three hundred three million, one hundred twenty-two thousand, twenty".