13131123233 has 4 divisors (see below), whose sum is σ = 13131679620. Its totient is φ = 13130566848.

The previous prime is 13131123227. The next prime is 13131123253. The reversal of 13131123233 is 33232113131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6160209169 + 6970914064 = 78487^2 + 83492^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131123233 - 2¹⁰ = 13131122209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131123199 and 13131123208.

It is not an unprimeable number, because it can be changed into a prime (13131123253) 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, 241148 + ... + 290541.

It is an arithmetic number, because the mean of its divisors is an integer number (3282919905).

Almost surely, 2^13131123233 is an apocalyptic number.

It is an amenable number.

13131123233 is a deficient number, since it is larger than the sum of its proper divisors (556387).

13131123233 is an equidigital number, since it uses as much as digits as its factorization.

13131123233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556386.

The product of its digits is 972, while the sum is 23.

Adding to 13131123233 its reverse (33232113131), we get a palindrome (46363236364).

The spelling of 13131123233 in words is "thirteen billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred thirty-three".