13031231011 has 4 divisors (see below), whose sum is σ = 13043220352. Its totient is φ = 13019241672.

The previous prime is 13031230973. The next prime is 13031231033. The reversal of 13031231011 is 11013213031.

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 13031231011 - 2³¹ = 10883747363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13031231611) 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, 5993040 + ... + 5995213.

It is an arithmetic number, because the mean of its divisors is an integer number (3260805088).

Almost surely, 2^13031231011 is an apocalyptic number.

13031231011 is a deficient number, since it is larger than the sum of its proper divisors (11989341).

13031231011 is a wasteful number, since it uses less digits than its factorization.

13031231011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989340.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 13031231011 its reverse (11013213031), we get a palindrome (24044444042).

The spelling of 13031231011 in words is "thirteen billion, thirty-one million, two hundred thirty-one thousand, eleven".