200121100021020 has 48 divisors (see below), whose sum is σ = 562406751986688. Its totient is φ = 53168705536320.

The previous prime is 200121100021019. The next prime is 200121100021021. The reversal of 200121100021020 is 20120001121002.

200121100021020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (200121100021019) and next prime (200121100021021).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 200121100020987 and 200121100021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121100021021) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6153769104 + ... + 6153801623.

It is an arithmetic number, because the mean of its divisors is an integer number (11716807333056).

Almost surely, 2^{200121100021020} is an apocalyptic number.

200121100021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200121100021020 is an abundant number, since it is smaller than the sum of its proper divisors (362285651965668).

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

200121100021020 is a wasteful number, since it uses less digits than its factorization.

200121100021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12307571010 (or 12307571008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200121100021020 its reverse (20120001121002), we get a palindrome (220241101142022).

The spelling of 200121100021020 in words is "two hundred trillion, one hundred twenty-one billion, one hundred million, twenty-one thousand, twenty".