13111133312420 has 96 divisors (see below), whose sum is σ = 32372609351040. Its totient is φ = 4397443061760.

The previous prime is 13111133312377. The next prime is 13111133312429. The reversal of 13111133312420 is 2421333111131.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 13111133312420.

It is not an unprimeable number, because it can be changed into a prime (13111133312429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1780124 + ... + 5421356.

It is an arithmetic number, because the mean of its divisors is an integer number (337214680740).

Almost surely, 2^{13111133312420} is an apocalyptic number.

13111133312420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13111133312420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16186304675520).

13111133312420 is an abundant number, since it is smaller than the sum of its proper divisors (19261476038620).

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

13111133312420 is a wasteful number, since it uses less digits than its factorization.

13111133312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642525 (or 3642523 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 13111133312420 its reverse (2421333111131), we get a palindrome (15532466423551).

The spelling of 13111133312420 in words is "thirteen trillion, one hundred eleven billion, one hundred thirty-three million, three hundred twelve thousand, four hundred twenty".