20112201012020 has 72 divisors (see below), whose sum is σ = 45878706156024. Its totient is φ = 7402617051648.

The previous prime is 20112201011921. The next prime is 20112201012061. The reversal of 20112201012020 is 2021010221102.

It can be written as a sum of positive squares in 12 ways, for example, as 18781025029264 + 1331175982756 = 4333708^2 + 1153766^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20112201011986 and 20112201012004.

It is a congruent number.

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, 8313959 + ... + 10456878.

It is an arithmetic number, because the mean of its divisors is an integer number (637204252167).

Almost surely, 2^{20112201012020} is an apocalyptic number.

20112201012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112201012020 is an abundant number, since it is smaller than the sum of its proper divisors (25766505144004).

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

20112201012020 is a wasteful number, since it uses less digits than its factorization.

20112201012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18771189 (or 18771174 counting only the distinct ones).

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

Adding to 20112201012020 its reverse (2021010221102), we get a palindrome (22133211233122).

The spelling of 20112201012020 in words is "twenty trillion, one hundred twelve billion, two hundred one million, twelve thousand, twenty".