311213323020 has 192 divisors, whose sum is σ = 993805908480. Its totient is φ = 72276406272.

The previous prime is 311213322991. The next prime is 311213323051. The reversal of 311213323020 is 20323312113.

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 63 ways as a sum of consecutive naturals, for example, 646614 + ... + 1020066.

It is an arithmetic number, because the mean of its divisors is an integer number (5176072440).

Almost surely, 2^311213323020 is an apocalyptic number.

311213323020 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 311213323020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496902954240).

311213323020 is an abundant number, since it is smaller than the sum of its proper divisors (682592585460).

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

311213323020 is a wasteful number, since it uses less digits than its factorization.

311213323020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373544 (or 373542 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 311213323020 its reverse (20323312113), we get a palindrome (331536635133).

The spelling of 311213323020 in words is "three hundred eleven billion, two hundred thirteen million, three hundred twenty-three thousand, twenty".