13111133421542 has 16 divisors (see below), whose sum is σ = 21179639508720. Its totient is φ = 6051259122912.

The previous prime is 13111133421541. The next prime is 13111133421619. The reversal of 13111133421542 is 24512433111131.

It is a junction number, because it is equal to n+sod(n) for n = 13111133421499 and 13111133421508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111133421541) 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, 3809684 + ... + 6382472.

It is an arithmetic number, because the mean of its divisors is an integer number (1323727469295).

Almost surely, 2^{13111133421542} is an apocalyptic number.

13111133421542 is a deficient number, since it is larger than the sum of its proper divisors (8068506087178).

13111133421542 is a wasteful number, since it uses less digits than its factorization.

13111133421542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768807.

The product of its digits is 8640, while the sum is 32.

Adding to 13111133421542 its reverse (24512433111131), we get a palindrome (37623566532673).

The spelling of 13111133421542 in words is "thirteen trillion, one hundred eleven billion, one hundred thirty-three million, four hundred twenty-one thousand, five hundred forty-two".