13121404031424 has 56 divisors (see below), whose sum is σ = 37387590340240. Its totient is φ = 4037355085824.

The previous prime is 13121404031377. The next prime is 13121404031447. The reversal of 13121404031424 is 42413040412131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13121404031391 and 13121404031400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2628483889 + ... + 2628488880.

It is an arithmetic number, because the mean of its divisors is an integer number (667635541790).

Almost surely, 2^{13121404031424} is an apocalyptic number.

It is an amenable number.

13121404031424 is an abundant number, since it is smaller than the sum of its proper divisors (24266186308816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121404031424 is a wasteful number, since it uses less digits than its factorization.

13121404031424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256972797 (or 5256972787 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 13121404031424 its reverse (42413040412131), we get a palindrome (55534444443555).

The spelling of 13121404031424 in words is "thirteen trillion, one hundred twenty-one billion, four hundred four million, thirty-one thousand, four hundred twenty-four".