13111231313203 has 4 divisors (see below), whose sum is σ = 13416143669368. Its totient is φ = 12806318957040.

The previous prime is 13111231313177. The next prime is 13111231313207. The reversal of 13111231313203 is 30231313211131.

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 13111231313203 - 2⁹ = 13111231312691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13111231313207) 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, 152456178018 + ... + 152456178103.

It is an arithmetic number, because the mean of its divisors is an integer number (3354035917342).

Almost surely, 2^{13111231313203} is an apocalyptic number.

13111231313203 is a deficient number, since it is larger than the sum of its proper divisors (304912356165).

13111231313203 is an equidigital number, since it uses as much as digits as its factorization.

13111231313203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304912356164.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 13111231313203 its reverse (30231313211131), we get a palindrome (43342544524334).

The spelling of 13111231313203 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-one million, three hundred thirteen thousand, two hundred three".