200121220222020 has 168 divisors, whose sum is σ = 636332158468440. Its totient is φ = 52837285478400.

The previous prime is 200121220222019. The next prime is 200121220222201. The reversal of 200121220222020 is 20222022121002.

200121220222020 is a `hidden beast` number, since 200 + 1 + 2 + 1 + 220 + 2 + 220 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 107602946297856 + 92518273924164 = 10373184^2 + 9618642^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 200121220221984 and 200121220222002.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 66476605 + ... + 69421764.

It is an arithmetic number, because the mean of its divisors is an integer number (3787691419455).

Almost surely, 2^{200121220222020} is an apocalyptic number.

200121220222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121220222020 is an abundant number, since it is smaller than the sum of its proper divisors (436210938246420).

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

200121220222020 is a wasteful number, since it uses less digits than its factorization.

200121220222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135898497 (or 135898480 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 200121220222020 its reverse (20222022121002), we get a palindrome (220343242343022).

The spelling of 200121220222020 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, twenty".