123102311111 has 4 divisors (see below), whose sum is σ = 132571719672. Its totient is φ = 113632902552.

The previous prime is 123102311099. The next prime is 123102311179. The reversal of 123102311111 is 111113201321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111113201321 = 41 ⋅2710078081.

It is not a de Polignac number, because 123102311111 - 2⁶ = 123102311047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123102311111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123102319111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4734704261 + ... + 4734704286.

It is an arithmetic number, because the mean of its divisors is an integer number (33142929918).

Almost surely, 2^123102311111 is an apocalyptic number.

123102311111 is a deficient number, since it is larger than the sum of its proper divisors (9469408561).

123102311111 is an equidigital number, since it uses as much as digits as its factorization.

123102311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9469408560.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 123102311111 its reverse (111113201321), we get a palindrome (234215512432).

The spelling of 123102311111 in words is "one hundred twenty-three billion, one hundred two million, three hundred eleven thousand, one hundred eleven".