1121122220111 has 2 divisors, whose sum is σ = 1121122220112. Its totient is φ = 1121122220110.

The previous prime is 1121122220083. The next prime is 1121122220123. The reversal of 1121122220111 is 1110222211211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1110222211211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121122220111 - 2⁶ = 1121122220047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121122220111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121122229111) 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 as a sum of consecutive naturals, namely, 560561110055 + 560561110056.

It is an arithmetic number, because the mean of its divisors is an integer number (560561110056).

Almost surely, 2^{1121122220111} is an apocalyptic number.

1121122220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121122220111 is an equidigital number, since it uses as much as digits as its factorization.

1121122220111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1121122220111 its reverse (1110222211211), we get a palindrome (2231344431322).

The spelling of 1121122220111 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".