123512111003 has 4 divisors (see below), whose sum is σ = 124605138648. Its totient is φ = 122419083360.

The previous prime is 123512110973. The next prime is 123512111029. The reversal of 123512111003 is 300111215321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300111215321 = 19609 ⋅15304769.

It is not a de Polignac number, because 123512111003 - 2¹⁰ = 123512109979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123512111903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546513653 + ... + 546513878.

It is an arithmetic number, because the mean of its divisors is an integer number (31151284662).

Almost surely, 2^123512111003 is an apocalyptic number.

123512111003 is a deficient number, since it is larger than the sum of its proper divisors (1093027645).

123512111003 is a wasteful number, since it uses less digits than its factorization.

123512111003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093027644.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 123512111003 its reverse (300111215321), we get a palindrome (423623326324).

The spelling of 123512111003 in words is "one hundred twenty-three billion, five hundred twelve million, one hundred eleven thousand, three".