311121313300020 has 48 divisors (see below), whose sum is σ = 909015315384960. Its totient is φ = 79358479913856.

The previous prime is 311121313300001. The next prime is 311121313300159. The reversal of 311121313300020 is 20003313121113.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 311121313300020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112725112135 + ... + 112725114894.

It is an arithmetic number, because the mean of its divisors is an integer number (18937819070520).

Almost surely, 2^{311121313300020} is an apocalyptic number.

311121313300020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311121313300020 is an abundant number, since it is smaller than the sum of its proper divisors (597894002084940).

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

311121313300020 is a wasteful number, since it uses less digits than its factorization.

311121313300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225450227064 (or 225450227062 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311121313300020 its reverse (20003313121113), we get a palindrome (331124626421133).

The spelling of 311121313300020 in words is "three hundred eleven trillion, one hundred twenty-one billion, three hundred thirteen million, three hundred thousand, twenty".