2102002101220 has 96 divisors (see below), whose sum is σ = 5067165438720. Its totient is φ = 717493800960.

The previous prime is 2102002101217. The next prime is 2102002101229. The reversal of 2102002101220 is 221012002012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2102002101220.

It is not an unprimeable number, because it can be changed into a prime (2102002101229) 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, 166568071 + ... + 166580689.

It is an arithmetic number, because the mean of its divisors is an integer number (52782973320).

Almost surely, 2^{2102002101220} is an apocalyptic number.

2102002101220 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 2102002101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2533582719360).

2102002101220 is an abundant number, since it is smaller than the sum of its proper divisors (2965163337500).

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

2102002101220 is a wasteful number, since it uses less digits than its factorization.

2102002101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17813 (or 17811 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2102002101220 its reverse (221012002012), we get a palindrome (2323014103232).

The spelling of 2102002101220 in words is "two trillion, one hundred two billion, two million, one hundred one thousand, two hundred twenty".