2011323220320 has 192 divisors, whose sum is σ = 6348952834560. Its totient is φ = 535229657088.

The previous prime is 2011323220303. The next prime is 2011323220343. The reversal of 2011323220320 is 230223231102.

It is a happy number.

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, 608200107 + ... + 608203413.

It is an arithmetic number, because the mean of its divisors is an integer number (33067462680).

Almost surely, 2^{2011323220320} is an apocalyptic number.

2011323220320 is a gapful number since it is divisible by the number (20) 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 2011323220320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3174476417280).

2011323220320 is an abundant number, since it is smaller than the sum of its proper divisors (4337629614240).

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

2011323220320 is a wasteful number, since it uses less digits than its factorization.

2011323220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597 (or 5589 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 2011323220320 its reverse (230223231102), we get a palindrome (2241546451422).

The spelling of 2011323220320 in words is "two trillion, eleven billion, three hundred twenty-three million, two hundred twenty thousand, three hundred twenty".