11124111121 has 2 divisors, whose sum is σ = 11124111122. Its totient is φ = 11124111120.

The previous prime is 11124111113. The next prime is 11124111139. The reversal of 11124111121 is 12111142111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7365072400 + 3759038721 = 85820^2 + 61311^2 .

It is a cyclic number.

It is not a de Polignac number, because 11124111121 - 2³ = 11124111113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11124111095 and 11124111104.

It is not a weakly prime, because it can be changed into another prime (11124111151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5562055560 + 5562055561.

It is an arithmetic number, because the mean of its divisors is an integer number (5562055561).

Almost surely, 2^11124111121 is an apocalyptic number.

It is an amenable number.

11124111121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11124111121 is an equidigital number, since it uses as much as digits as its factorization.

11124111121 is an evil number, because the sum of its binary digits is even.

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

Adding to 11124111121 its reverse (12111142111), we get a palindrome (23235253232).

The spelling of 11124111121 in words is "eleven billion, one hundred twenty-four million, one hundred eleven thousand, one hundred twenty-one".