200121112021220 has 384 divisors, whose sum is σ = 498533562777600. Its totient is φ = 66813830553600.

The previous prime is 200121112021211. The next prime is 200121112021231. The reversal of 200121112021220 is 22120211121002.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 11819796155 + ... + 11819813085.

It is an arithmetic number, because the mean of its divisors is an integer number (1298264486400).

Almost surely, 2^{200121112021220} is an apocalyptic number.

200121112021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200121112021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249266781388800).

200121112021220 is an abundant number, since it is smaller than the sum of its proper divisors (298412450756380).

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

200121112021220 is a wasteful number, since it uses less digits than its factorization.

200121112021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18059 (or 18057 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200121112021220 its reverse (22120211121002), we get a palindrome (222241323142222).

The spelling of 200121112021220 in words is "two hundred trillion, one hundred twenty-one billion, one hundred twelve million, twenty-one thousand, two hundred twenty".