1222001122121 has 16 divisors (see below), whose sum is σ = 1358960137920. Its totient is φ = 1091660431680.

The previous prime is 1222001122109. The next prime is 1222001122157. The reversal of 1222001122121 is 1212211002221.

It is a de Polignac number, because none of the positive numbers 2^k-1222001122121 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 1222001122121.

It is not an unprimeable number, because it can be changed into a prime (1222001122421) 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 15 ways as a sum of consecutive naturals, for example, 9966815 + ... + 10088676.

It is an arithmetic number, because the mean of its divisors is an integer number (84935008620).

Almost surely, 2^{1222001122121} is an apocalyptic number.

It is an amenable number.

1222001122121 is a deficient number, since it is larger than the sum of its proper divisors (136959015799).

1222001122121 is a wasteful number, since it uses less digits than its factorization.

1222001122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20055656.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222001122121 its reverse (1212211002221), we get a palindrome (2434212124342).

The spelling of 1222001122121 in words is "one trillion, two hundred twenty-two billion, one million, one hundred twenty-two thousand, one hundred twenty-one".