200001221212122 has 48 divisors (see below), whose sum is σ = 490238683657632. Its totient is φ = 60606430668720.

The previous prime is 200001221212081. The next prime is 200001221212201. The reversal of 200001221212122 is 221212122100002.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 200001221212095 and 200001221212104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18705683133 + ... + 18705693824.

It is an arithmetic number, because the mean of its divisors is an integer number (10213305909534).

Almost surely, 2^{200001221212122} is an apocalyptic number.

200001221212122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

200001221212122 is an abundant number, since it is smaller than the sum of its proper divisors (290237462445510).

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

200001221212122 is a wasteful number, since it uses less digits than its factorization.

200001221212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37411376985 (or 37411376973 counting only the distinct ones).

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

Adding to 200001221212122 its reverse (221212122100002), we get a palindrome (421213343312124).

The spelling of 200001221212122 in words is "two hundred trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-two".