1212200000221 has 8 divisors (see below), whose sum is σ = 1394546075264. Its totient is φ = 1032147586800.

The previous prime is 1212200000213. The next prime is 1212200000227. The reversal of 1212200000221 is 1220000022121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1212200000221 - 2³ = 1212200000213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212200000227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 573414270 + ... + 573416383.

It is an arithmetic number, because the mean of its divisors is an integer number (174318259408).

Almost surely, 2^{1212200000221} is an apocalyptic number.

It is an amenable number.

1212200000221 is a deficient number, since it is larger than the sum of its proper divisors (182346075043).

1212200000221 is a wasteful number, since it uses less digits than its factorization.

1212200000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146830811.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212200000221 its reverse (1220000022121), we get a palindrome (2432200022342).

The spelling of 1212200000221 in words is "one trillion, two hundred twelve billion, two hundred million, two hundred twenty-one", and thus it is an aban number.