2311331021320 has 64 divisors (see below), whose sum is σ = 5214248478720. Its totient is φ = 922089256704.

The previous prime is 2311331021249. The next prime is 2311331021327. The reversal of 2311331021320 is 231201331132.

It is a junction number, because it is equal to n+sod(n) for n = 2311331021291 and 2311331021300.

It is not an unprimeable number, because it can be changed into a prime (2311331021327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39659242 + ... + 39717478.

It is an arithmetic number, because the mean of its divisors is an integer number (81472632480).

Almost surely, 2^{2311331021320} is an apocalyptic number.

2311331021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311331021320 is an abundant number, since it is smaller than the sum of its proper divisors (2902917457400).

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

2311331021320 is a wasteful number, since it uses less digits than its factorization.

2311331021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60854 (or 60850 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2311331021320 its reverse (231201331132), we get a palindrome (2542532352452).

The spelling of 2311331021320 in words is "two trillion, three hundred eleven billion, three hundred thirty-one million, twenty-one thousand, three hundred twenty".