311310111020020 has 96 divisors (see below), whose sum is σ = 751126436831232. Its totient is φ = 106166287277568.

The previous prime is 311310111020009. The next prime is 311310111020033. The reversal of 311310111020020 is 20020111013113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 311310111019976 and 311310111020003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107987182 + ... + 110832538.

It is an arithmetic number, because the mean of its divisors is an integer number (7824233716992).

Almost surely, 2^{311310111020020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311310111020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375563218415616).

311310111020020 is an abundant number, since it is smaller than the sum of its proper divisors (439816325811212).

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

311310111020020 is a wasteful number, since it uses less digits than its factorization.

311310111020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849537 (or 2849535 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 311310111020020 its reverse (20020111013113), we get a palindrome (331330222033133).

The spelling of 311310111020020 in words is "three hundred eleven trillion, three hundred ten billion, one hundred eleven million, twenty thousand, twenty".