2002011021220 has 72 divisors (see below), whose sum is σ = 4893767686080. Its totient is φ = 685962970560.

The previous prime is 2002011021191. The next prime is 2002011021233. The reversal of 2002011021220 is 221201102002.

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 2002011021220.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 872635 + ... + 2183005.

It is an arithmetic number, because the mean of its divisors is an integer number (67968995640).

Almost surely, 2^{2002011021220} is an apocalyptic number.

2002011021220 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 2002011021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2446883843040).

2002011021220 is an abundant number, since it is smaller than the sum of its proper divisors (2891756664860).

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

2002011021220 is a wasteful number, since it uses less digits than its factorization.

2002011021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311953 (or 1311944 counting only the distinct ones).

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

Adding to 2002011021220 its reverse (221201102002), we get a palindrome (2223212123222).

The spelling of 2002011021220 in words is "two trillion, two billion, eleven million, twenty-one thousand, two hundred twenty".