13011231111 has 8 divisors (see below), whose sum is σ = 17349615360. Its totient is φ = 8673500472.

The previous prime is 13011231073. The next prime is 13011231113. The reversal of 13011231111 is 11113211031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13011231111 - 2¹⁸ = 13010968967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011231113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114895 + ... + 198048.

It is an arithmetic number, because the mean of its divisors is an integer number (2168701920).

Almost surely, 2^13011231111 is an apocalyptic number.

13011231111 is a deficient number, since it is larger than the sum of its proper divisors (4338384249).

13011231111 is a wasteful number, since it uses less digits than its factorization.

13011231111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326805.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 13011231111 its reverse (11113211031), we get a palindrome (24124442142).

The spelling of 13011231111 in words is "thirteen billion, eleven million, two hundred thirty-one thousand, one hundred eleven".