13112011201221 has 6 divisors (see below), whose sum is σ = 18939571735110. Its totient is φ = 8741340800808.

The previous prime is 13112011201147. The next prime is 13112011201283. The reversal of 13112011201221 is 12210211021131.

It is a happy number.

13112011201221 is a `hidden beast` number, since 1 + 311 + 20 + 112 + 0 + 1 + 221 = 666.

13112011201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11505569024196 + 1606442177025 = 3391986^2 + 1267455^2 .

It is not a de Polignac number, because 13112011201221 - 2¹⁵ = 13112011168453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13112011201194 and 13112011201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112011251221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 728445066726 + ... + 728445066743.

It is an arithmetic number, because the mean of its divisors is an integer number (3156595289185).

Almost surely, 2^{13112011201221} is an apocalyptic number.

It is an amenable number.

13112011201221 is a deficient number, since it is larger than the sum of its proper divisors (5827560533889).

13112011201221 is a wasteful number, since it uses less digits than its factorization.

13112011201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456890133475 (or 1456890133472 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 13112011201221 its reverse (12210211021131), we get a palindrome (25322222222352).

The spelling of 13112011201221 in words is "thirteen trillion, one hundred twelve billion, eleven million, two hundred one thousand, two hundred twenty-one".