13111223133 has 4 divisors (see below), whose sum is σ = 17481630848. Its totient is φ = 8740815420.

The previous prime is 13111223131. The next prime is 13111223137. The reversal of 13111223133 is 33132211131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13111223133 - 2¹ = 13111223131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111223131) 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, 2185203853 + ... + 2185203858.

It is an arithmetic number, because the mean of its divisors is an integer number (4370407712).

Almost surely, 2^13111223133 is an apocalyptic number.

It is an amenable number.

13111223133 is a deficient number, since it is larger than the sum of its proper divisors (4370407715).

13111223133 is an equidigital number, since it uses as much as digits as its factorization.

13111223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4370407714.

The product of its digits is 324, while the sum is 21.

Adding to 13111223133 its reverse (33132211131), we get a palindrome (46243434264).

The spelling of 13111223133 in words is "thirteen billion, one hundred eleven million, two hundred twenty-three thousand, one hundred thirty-three".