200121220100020 has 12 divisors (see below), whose sum is σ = 420254562210084. Its totient is φ = 80048488040000.

The previous prime is 200121220100017. The next prime is 200121220100051. The reversal of 200121220100020 is 20001022121002.

It is a happy number.

200121220100020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 94266506300836 + 105854713799184 = 9709094^2 + 10288572^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5003030502481 + ... + 5003030502520.

It is an arithmetic number, because the mean of its divisors is an integer number (35021213517507).

Almost surely, 2^{200121220100020} is an apocalyptic number.

200121220100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121220100020 is an abundant number, since it is smaller than the sum of its proper divisors (220133342110064).

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

200121220100020 is a wasteful number, since it uses less digits than its factorization.

200121220100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006061005010 (or 10006061005008 counting only the distinct ones).

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

Adding to 200121220100020 its reverse (20001022121002), we get a palindrome (220122242221022).

The spelling of 200121220100020 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, one hundred thousand, twenty".