13113221123 has 4 divisors (see below), whose sum is σ = 13536228288. Its totient is φ = 12690213960.

The previous prime is 13113221119. The next prime is 13113221137. The reversal of 13113221123 is 32112231131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112231131 = 80621 ⋅398311.

It is a cyclic number.

It is not a de Polignac number, because 13113221123 - 2² = 13113221119 is a prime.

It is a super-2 number, since 2×13113221123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13113221095 and 13113221104.

It is not an unprimeable number, because it can be changed into a prime (13113227123) 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, 211503536 + ... + 211503597.

It is an arithmetic number, because the mean of its divisors is an integer number (3384057072).

Almost surely, 2^13113221123 is an apocalyptic number.

13113221123 is a deficient number, since it is larger than the sum of its proper divisors (423007165).

13113221123 is an equidigital number, since it uses as much as digits as its factorization.

13113221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423007164.

The product of its digits is 216, while the sum is 20.

Adding to 13113221123 its reverse (32112231131), we get a palindrome (45225452254).

The spelling of 13113221123 in words is "thirteen billion, one hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-three".