1121121121111 has 2 divisors, whose sum is σ = 1121121121112. Its totient is φ = 1121121121110.

The previous prime is 1121121121091. The next prime is 1121121121123. The reversal of 1121121121111 is 1111211211211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121121121111 - 2¹³ = 1121121112919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121121121151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560560560555 + 560560560556.

It is an arithmetic number, because the mean of its divisors is an integer number (560560560556).

Almost surely, 2^{1121121121111} is an apocalyptic number.

1121121121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121121121111 is an equidigital number, since it uses as much as digits as its factorization.

1121121121111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8, while the sum is 16.

Adding to 1121121121111 its reverse (1111211211211), we get a palindrome (2232332332322).

It can be divided in two parts, 11211211211 and 11, that multiplied together give a palindrome (123323323321).

The spelling of 1121121121111 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred eleven".