2102221012220 has 96 divisors (see below), whose sum is σ = 5095527091200. Its totient is φ = 713593880064.

The previous prime is 2102221012219. The next prime is 2102221012223. The reversal of 2102221012220 is 222101222012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102221012223) 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, 70484471 + ... + 70514289.

It is an arithmetic number, because the mean of its divisors is an integer number (53078407200).

Almost surely, 2^{2102221012220} is an apocalyptic number.

2102221012220 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 2102221012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2547763545600).

2102221012220 is an abundant number, since it is smaller than the sum of its proper divisors (2993306078980).

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

2102221012220 is a wasteful number, since it uses less digits than its factorization.

2102221012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34827 (or 34825 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2102221012220 its reverse (222101222012), we get a palindrome (2324322234232).

The spelling of 2102221012220 in words is "two trillion, one hundred two billion, two hundred twenty-one million, twelve thousand, two hundred twenty".