1200001222211 has 8 divisors (see below), whose sum is σ = 1327025013744. Its totient is φ = 1075966225920.

The previous prime is 1200001222207. The next prime is 1200001222249. The reversal of 1200001222211 is 1122221000021.

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 1200001222211 - 2² = 1200001222207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200001222261) 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, 747197966 + ... + 747199571.

It is an arithmetic number, because the mean of its divisors is an integer number (165878126718).

Almost surely, 2^{1200001222211} is an apocalyptic number.

1200001222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200001222211 is a deficient number, since it is larger than the sum of its proper divisors (127023791533).

1200001222211 is a wasteful number, since it uses less digits than its factorization.

1200001222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494397621.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200001222211 its reverse (1122221000021), we get a palindrome (2322222222232).

The spelling of 1200001222211 in words is "one trillion, two hundred billion, one million, two hundred twenty-two thousand, two hundred eleven".