220121121112200 has 1728 divisors, whose sum is σ = 1019339043840000. Its totient is φ = 41934195072000.

The previous prime is 220121121112159. The next prime is 220121121112229. The reversal of 220121121112200 is 2211121121022.

220121121112200 is a `hidden beast` number, since 2 + 20 + 1 + 211 + 211 + 1 + 220 + 0 = 666.

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

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 431 ways as a sum of consecutive naturals, for example, 571255201 + ... + 571640399.

It is an arithmetic number, because the mean of its divisors is an integer number (589895280000).

Almost surely, 2^{220121121112200} is an apocalyptic number.

220121121112200 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 220121121112200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509669521920000).

220121121112200 is an abundant number, since it is smaller than the sum of its proper divisors (799217922727800).

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

220121121112200 is a wasteful number, since it uses less digits than its factorization.

220121121112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385296 (or 385277 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220121121112200 its reverse (2211121121022), we get a palindrome (222332242233222).

The spelling of 220121121112200 in words is "two hundred twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, two hundred".