13111213123 has 4 divisors (see below), whose sum is σ = 13121481600. Its totient is φ = 13100944648.

The previous prime is 13111213103. The next prime is 13111213177. The reversal of 13111213123 is 32131211131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13111213123 - 2¹⁷ = 13111082051 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 13111213123.

It is not an unprimeable number, because it can be changed into a prime (13111213103) 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, 5132323 + ... + 5134876.

It is an arithmetic number, because the mean of its divisors is an integer number (3280370400).

Almost surely, 2^13111213123 is an apocalyptic number.

13111213123 is a deficient number, since it is larger than the sum of its proper divisors (10268477).

13111213123 is a wasteful number, since it uses less digits than its factorization.

13111213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10268476.

The product of its digits is 108, while the sum is 19.

Adding to 13111213123 its reverse (32131211131), we get a palindrome (45242424254).

The spelling of 13111213123 in words is "thirteen billion, one hundred eleven million, two hundred thirteen thousand, one hundred twenty-three".