20102220120120 has 128 divisors (see below), whose sum is σ = 62936376192000. Its totient is φ = 5126896456704.

The previous prime is 20102220120011. The next prime is 20102220120139. The reversal of 20102220120120 is 2102102220102.

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 20102220120120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22365156 + ... + 23246604.

It is an arithmetic number, because the mean of its divisors is an integer number (491690439000).

Almost surely, 2^{20102220120120} is an apocalyptic number.

20102220120120 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 20102220120120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31468188096000).

20102220120120 is an abundant number, since it is smaller than the sum of its proper divisors (42834156071880).

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

20102220120120 is a wasteful number, since it uses less digits than its factorization.

20102220120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889749 (or 889745 counting only the distinct ones).

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

Adding to 20102220120120 its reverse (2102102220102), we get a palindrome (22204322340222).

The spelling of 20102220120120 in words is "twenty trillion, one hundred two billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty".