311033212020 has 144 divisors (see below), whose sum is σ = 975432407040. Its totient is φ = 80140492800.

The previous prime is 311033212019. The next prime is 311033212027. The reversal of 311033212020 is 20212330113.

311033212020 is a `hidden beast` number, since 311 + 0 + 332 + 1 + 2 + 0 + 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 = 311033211984 and 311033212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311033212027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3533301 + ... + 3620259.

It is an arithmetic number, because the mean of its divisors is an integer number (6773836160).

Almost surely, 2^311033212020 is an apocalyptic number.

311033212020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311033212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487716203520).

311033212020 is an abundant number, since it is smaller than the sum of its proper divisors (664399195020).

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

311033212020 is a wasteful number, since it uses less digits than its factorization.

311033212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87646 (or 87641 counting only the distinct ones).

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

Adding to 311033212020 its reverse (20212330113), we get a palindrome (331245542133).

The spelling of 311033212020 in words is "three hundred eleven billion, thirty-three million, two hundred twelve thousand, twenty".