13511231204122 has 4 divisors (see below), whose sum is σ = 20266846806186. Its totient is φ = 6755615602060.

The previous prime is 13511231204117. The next prime is 13511231204129. The reversal of 13511231204122 is 22140213211531.

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

It can be written as a sum of positive squares in only one way, i.e., 11401704442881 + 2109526761241 = 3376641^2 + 1452421^2 .

It is not an unprimeable number, because it can be changed into a prime (13511231204129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3377807801029 + ... + 3377807801032.

Almost surely, 2^{13511231204122} is an apocalyptic number.

13511231204122 is a deficient number, since it is larger than the sum of its proper divisors (6755615602064).

13511231204122 is an equidigital number, since it uses as much as digits as its factorization.

13511231204122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755615602063.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 13511231204122 its reverse (22140213211531), we get a palindrome (35651444415653).

The spelling of 13511231204122 in words is "thirteen trillion, five hundred eleven billion, two hundred thirty-one million, two hundred four thousand, one hundred twenty-two".