11111011123 has 2 divisors, whose sum is σ = 11111011124. Its totient is φ = 11111011122.

The previous prime is 11111011117. The next prime is 11111011133. The reversal of 11111011123 is 32111011111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111011123 - 2⁵ = 11111011091 is a prime.

It is a super-2 number, since 2×11111011123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11111011133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555505561 + 5555505562.

It is an arithmetic number, because the mean of its divisors is an integer number (5555505562).

Almost surely, 2^11111011123 is an apocalyptic number.

11111011123 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111011123 is an equidigital number, since it uses as much as digits as its factorization.

11111011123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11111011123 its reverse (32111011111), we get a palindrome (43222022234).

The spelling of 11111011123 in words is "eleven billion, one hundred eleven million, eleven thousand, one hundred twenty-three".