1200222220121 has 8 divisors (see below), whose sum is σ = 1200978757440. Its totient is φ = 1199465836912.

The previous prime is 1200222220117. The next prime is 1200222220129. The reversal of 1200222220121 is 1210222220021.

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 1200222220121 - 2² = 1200222220117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200222220121.

It is not an unprimeable number, because it can be changed into a prime (1200222220129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18195626 + ... + 18261468.

It is an arithmetic number, because the mean of its divisors is an integer number (150122344680).

Almost surely, 2^{1200222220121} is an apocalyptic number.

It is an amenable number.

1200222220121 is a deficient number, since it is larger than the sum of its proper divisors (756537319).

1200222220121 is an equidigital number, since it uses as much as digits as its factorization.

1200222220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77055.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1200222220121 its reverse (1210222220021), we get a palindrome (2410444440142).

The spelling of 1200222220121 in words is "one trillion, two hundred billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".