13112011113221 has 4 divisors (see below), whose sum is σ = 13564149427500. Its totient is φ = 12659872798944.

The previous prime is 13112011113161. The next prime is 13112011113233. The reversal of 13112011113221 is 12231111021131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6606904752100 + 6505106361121 = 2570390^2 + 2550511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13112011113221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13112011113193 and 13112011113202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112011113241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226069157096 + ... + 226069157153.

It is an arithmetic number, because the mean of its divisors is an integer number (3391037356875).

Almost surely, 2^{13112011113221} is an apocalyptic number.

It is an amenable number.

13112011113221 is a deficient number, since it is larger than the sum of its proper divisors (452138314279).

13112011113221 is an equidigital number, since it uses as much as digits as its factorization.

13112011113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452138314278.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 13112011113221 its reverse (12231111021131), we get a palindrome (25343122134352).

The spelling of 13112011113221 in words is "thirteen trillion, one hundred twelve billion, eleven million, one hundred thirteen thousand, two hundred twenty-one".