1200001221222 has 8 divisors (see below), whose sum is σ = 2400002442456. Its totient is φ = 400000407072.

The previous prime is 1200001221161. The next prime is 1200001221257. The reversal of 1200001221222 is 2221221000021.

It is a sphenic number, since it is the product of 3 distinct primes.

1200001221222 is an admirable number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 100000101763 + ... + 100000101774.

It is an arithmetic number, because the mean of its divisors is an integer number (300000305307).

Almost surely, 2^{1200001221222} is an apocalyptic number.

1200001221222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1200001221222 is a wasteful number, since it uses less digits than its factorization.

1200001221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200000203542.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1200001221222 its reverse (2221221000021), we get a palindrome (3421222221243).

The spelling of 1200001221222 in words is "one trillion, two hundred billion, one million, two hundred twenty-one thousand, two hundred twenty-two".