1122212111111 has 16 divisors (see below), whose sum is σ = 1425738467328. Its totient is φ = 859262018400.

The previous prime is 1122212111021. The next prime is 1122212111123. The reversal of 1122212111111 is 1111112122211.

It is a cyclic number.

It is not a de Polignac number, because 1122212111111 - 2³⁰ = 1121138369287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1122212111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122212111131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198900425 + ... + 198906066.

It is an arithmetic number, because the mean of its divisors is an integer number (89108654208).

Almost surely, 2^{1122212111111} is an apocalyptic number.

1122212111111 is a deficient number, since it is larger than the sum of its proper divisors (303526356217).

1122212111111 is a wasteful number, since it uses less digits than its factorization.

1122212111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397806542.

The product of its digits is 16, while the sum is 17.

Adding to 1122212111111 its reverse (1111112122211), we get a palindrome (2233324233322).

The spelling of 1122212111111 in words is "one trillion, one hundred twenty-two billion, two hundred twelve million, one hundred eleven thousand, one hundred eleven".