2011000323220 has 96 divisors (see below), whose sum is σ = 5115129626880. Its totient is φ = 648315402240.

The previous prime is 2011000323217. The next prime is 2011000323259. The reversal of 2011000323220 is 223230001102.

It is a junction number, because it is equal to n+sod(n) for n = 2011000323194 and 2011000323203.

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, 2126991 + ... + 2923369.

It is an arithmetic number, because the mean of its divisors is an integer number (53282600280).

Almost surely, 2^{2011000323220} is an apocalyptic number.

2011000323220 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 2011000323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2557564813440).

2011000323220 is an abundant number, since it is smaller than the sum of its proper divisors (3104129303660).

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

2011000323220 is a wasteful number, since it uses less digits than its factorization.

2011000323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797473 (or 797471 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 2011000323220 its reverse (223230001102), we get a palindrome (2234230324322).

The spelling of 2011000323220 in words is "two trillion, eleven billion, three hundred twenty-three thousand, two hundred twenty".