2101200122220 has 96 divisors (see below), whose sum is σ = 5922687859200. Its totient is φ = 556579206144.

The previous prime is 2101200122137. The next prime is 2101200122221. The reversal of 2101200122220 is 222210021012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2101200122220.

It is not an unprimeable number, because it can be changed into a prime (2101200122221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14547316 + ... + 14691044.

It is an arithmetic number, because the mean of its divisors is an integer number (61694665200).

Almost surely, 2^{2101200122220} is an apocalyptic number.

2101200122220 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 2101200122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2961343929600).

2101200122220 is an abundant number, since it is smaller than the sum of its proper divisors (3821487736980).

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

2101200122220 is a wasteful number, since it uses less digits than its factorization.

2101200122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145367 (or 145365 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2101200122220 its reverse (222210021012), we get a palindrome (2323410143232).

The spelling of 2101200122220 in words is "two trillion, one hundred one billion, two hundred million, one hundred twenty-two thousand, two hundred twenty".