13111031213220 has 144 divisors (see below), whose sum is σ = 38776335716160. Its totient is φ = 3309558711552.

The previous prime is 13111031213209. The next prime is 13111031213221. The reversal of 13111031213220 is 2231213011131.

It is not an unprimeable number, because it can be changed into a prime (13111031213221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26373879 + ... + 26866401.

It is an arithmetic number, because the mean of its divisors is an integer number (269280109140).

Almost surely, 2^{13111031213220} is an apocalyptic number.

13111031213220 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 13111031213220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19388167858080).

13111031213220 is an abundant number, since it is smaller than the sum of its proper divisors (25665304502940).

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

13111031213220 is a wasteful number, since it uses less digits than its factorization.

13111031213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493802 (or 493781 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 13111031213220 its reverse (2231213011131), we get a palindrome (15342244224351).

The spelling of 13111031213220 in words is "thirteen trillion, one hundred eleven billion, thirty-one million, two hundred thirteen thousand, two hundred twenty".