2101320020 has 96 divisors (see below), whose sum is σ = 4895251200. Its totient is φ = 753629184.

The previous prime is 2101320017. The next prime is 2101320079. The reversal of 2101320020 is 200231012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2101319983 and 2101320010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2963426 + ... + 2964134.

It is an arithmetic number, because the mean of its divisors is an integer number (50992200).

Almost surely, 2^2101320020 is an apocalyptic number.

2101320020 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 2101320020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2447625600).

2101320020 is an abundant number, since it is smaller than the sum of its proper divisors (2793931180).

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

2101320020 is a wasteful number, since it uses less digits than its factorization.

2101320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2101320020 is about 45840.1572859431. The cubic root of 2101320020 is about 1280.8474246781.

Adding to 2101320020 its reverse (200231012), we get a palindrome (2301551032).

The spelling of 2101320020 in words is "two billion, one hundred one million, three hundred twenty thousand, twenty".