20101220112020 has 12 divisors (see below), whose sum is σ = 42212562235284. Its totient is φ = 8040488044800.

The previous prime is 20101220112013. The next prime is 20101220112023. The reversal of 20101220112020 is 2021102210102.

It can be written as a sum of positive squares in 2 ways, for example, as 12089501184016 + 8011718928004 = 3476996^2 + 2830498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20101220111986 and 20101220112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101220112023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502530502781 + ... + 502530502820.

It is an arithmetic number, because the mean of its divisors is an integer number (3517713519607).

Almost surely, 2^{20101220112020} is an apocalyptic number.

20101220112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101220112020 is an abundant number, since it is smaller than the sum of its proper divisors (22111342123264).

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

20101220112020 is a wasteful number, since it uses less digits than its factorization.

20101220112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005061005610 (or 1005061005608 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20101220112020 its reverse (2021102210102), we get a palindrome (22122322322122).

The spelling of 20101220112020 in words is "twenty trillion, one hundred one billion, two hundred twenty million, one hundred twelve thousand, twenty".