2013112313221 has 4 divisors (see below), whose sum is σ = 2013203061100. Its totient is φ = 2013021565344.

The previous prime is 2013112313203. The next prime is 2013112313299. The reversal of 2013112313221 is 1223132113102.

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 1828417796100 + 184694517121 = 1352190^2 + 429761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013112313221 - 2⁹ = 2013112312709 is a prime.

It is a super-2 number, since 2×2013112313221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013112313192 and 2013112313201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013112313021) 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, 45340656 + ... + 45385033.

It is an arithmetic number, because the mean of its divisors is an integer number (503300765275).

Almost surely, 2^{2013112313221} is an apocalyptic number.

It is an amenable number.

2013112313221 is a deficient number, since it is larger than the sum of its proper divisors (90747879).

2013112313221 is an equidigital number, since it uses as much as digits as its factorization.

2013112313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90747878.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2013112313221 its reverse (1223132113102), we get a palindrome (3236244426323).

The spelling of 2013112313221 in words is "two trillion, thirteen billion, one hundred twelve million, three hundred thirteen thousand, two hundred twenty-one".