123111003105 has 12 divisors (see below), whose sum is σ = 213392405460. Its totient is φ = 65659201632.

The previous prime is 123111003047. The next prime is 123111003109. The reversal of 123111003105 is 501300111321.

It can be written as a sum of positive squares in 2 ways, for example, as 80207337681 + 42903665424 = 283209^2 + 207132^2 .

It is not a de Polignac number, because 123111003105 - 2⁷ = 123111002977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123111003109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1367899990 + ... + 1367900079.

It is an arithmetic number, because the mean of its divisors is an integer number (17782700455).

Almost surely, 2^123111003105 is an apocalyptic number.

123111003105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123111003105 is a deficient number, since it is larger than the sum of its proper divisors (90281402355).

123111003105 is a wasteful number, since it uses less digits than its factorization.

123111003105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735800080 (or 2735800077 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

Adding to 123111003105 its reverse (501300111321), we get a palindrome (624411114426).

The spelling of 123111003105 in words is "one hundred twenty-three billion, one hundred eleven million, three thousand, one hundred five".