200121021122020 has 12 divisors (see below), whose sum is σ = 420254144356284. Its totient is φ = 80048408448800.

The previous prime is 200121021121993. The next prime is 200121021122101. The reversal of 200121021122020 is 20221120121002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 88975112406244 + 111145908715776 = 9432662^2 + 10542576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 200121021121985 and 200121021122003.

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 3 ways as a sum of consecutive naturals, for example, 5003025528031 + ... + 5003025528070.

It is an arithmetic number, because the mean of its divisors is an integer number (35021178696357).

Almost surely, 2^{200121021122020} is an apocalyptic number.

200121021122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121021122020 is an abundant number, since it is smaller than the sum of its proper divisors (220133123234264).

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

200121021122020 is a wasteful number, since it uses less digits than its factorization.

200121021122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006051056110 (or 10006051056108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 200121021122020 its reverse (20221120121002), we get a palindrome (220342141243022).

The spelling of 200121021122020 in words is "two hundred trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, twenty".