2020121021100 has 576 divisors, whose sum is σ = 7721331803136. Its totient is φ = 395649515520.

The previous prime is 2020121021069. The next prime is 2020121021123. The reversal of 2020121021100 is 11201210202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 33849487 + ... + 33909113.

It is an arithmetic number, because the mean of its divisors is an integer number (13405089936).

Almost surely, 2^{2020121021100} is an apocalyptic number.

2020121021100 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 2020121021100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3860665901568).

2020121021100 is an abundant number, since it is smaller than the sum of its proper divisors (5701210782036).

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

2020121021100 is a wasteful number, since it uses less digits than its factorization.

2020121021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59754 (or 59747 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2020121021100 its reverse (11201210202), we get a palindrome (2031322231302).

The spelling of 2020121021100 in words is "two trillion, twenty billion, one hundred twenty-one million, twenty-one thousand, one hundred".