20210120210020 has 192 divisors, whose sum is σ = 47845807543296. Its totient is φ = 7120992890880.

The previous prime is 20210120209991. The next prime is 20210120210051. The reversal of 20210120210020 is 2001202101202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 895311454 + ... + 895334026.

It is an arithmetic number, because the mean of its divisors is an integer number (249196914288).

Almost surely, 2^{20210120210020} is an apocalyptic number.

20210120210020 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 20210120210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23922903771648).

20210120210020 is an abundant number, since it is smaller than the sum of its proper divisors (27635687333276).

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

20210120210020 is a wasteful number, since it uses less digits than its factorization.

20210120210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24470 (or 24468 counting only the distinct ones).

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

Adding to 20210120210020 its reverse (2001202101202), we get a palindrome (22211322311222).

The spelling of 20210120210020 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, two hundred ten thousand, twenty".