221212112020200 has 288 divisors, whose sum is σ = 868778112945600. Its totient is φ = 49386890004480.

The previous prime is 221212112020187. The next prime is 221212112020247. The reversal of 221212112020200 is 2020211212122.

It is a happy number.

221212112020200 is a `hidden beast` number, since 2 + 212 + 1 + 211 + 20 + 20 + 200 = 666.

221212112020200 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 203603745 + ... + 204687344.

It is an arithmetic number, because the mean of its divisors is an integer number (3016590669950).

Almost surely, 2^{221212112020200} is an apocalyptic number.

221212112020200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212112020200 is an abundant number, since it is smaller than the sum of its proper divisors (647566000925400).

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

221212112020200 is a wasteful number, since it uses less digits than its factorization.

221212112020200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408291161 (or 408291149 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221212112020200 its reverse (2020211212122), we get a palindrome (223232323232322).

The spelling of 221212112020200 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred twelve million, twenty thousand, two hundred".