1123312123111 has 2 divisors, whose sum is σ = 1123312123112. Its totient is φ = 1123312123110.

The previous prime is 1123312123051. The next prime is 1123312123117. The reversal of 1123312123111 is 1113212133211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123312123111 - 2³⁵ = 1088952384743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123312123117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561656061555 + 561656061556.

It is an arithmetic number, because the mean of its divisors is an integer number (561656061556).

Almost surely, 2^{1123312123111} is an apocalyptic number.

1123312123111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123312123111 is an equidigital number, since it uses as much as digits as its factorization.

1123312123111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

Adding to 1123312123111 its reverse (1113212133211), we get a palindrome (2236524256322).

The spelling of 1123312123111 in words is "one trillion, one hundred twenty-three billion, three hundred twelve million, one hundred twenty-three thousand, one hundred eleven".