200221121100 has 288 divisors, whose sum is σ = 777811216896. Its totient is φ = 38403993600.

The previous prime is 200221121011. The next prime is 200221121131. The reversal of 200221121100 is 1121122002.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33069 + ... + 633668.

It is an arithmetic number, because the mean of its divisors is an integer number (2700733392).

Almost surely, 2^200221121100 is an apocalyptic number.

200221121100 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 200221121100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388905608448).

200221121100 is an abundant number, since it is smaller than the sum of its proper divisors (577590095796).

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

200221121100 is a wasteful number, since it uses less digits than its factorization.

200221121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666785 (or 666778 counting only the distinct ones).

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

Adding to 200221121100 its reverse (1121122002), we get a palindrome (201342243102).

The spelling of 200221121100 in words is "two hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred".