2013011221321 has 4 divisors (see below), whose sum is σ = 2013014237332. Its totient is φ = 2013008205312.

The previous prime is 2013011221301. The next prime is 2013011221343. The reversal of 2013011221321 is 1231221103102.

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 1671166365696 + 341844855625 = 1292736^2 + 584675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013011221321 - 2⁵ = 2013011221289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2013011221301) 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, 12420 + ... + 2006533.

It is an arithmetic number, because the mean of its divisors is an integer number (503253559333).

Almost surely, 2^{2013011221321} is an apocalyptic number.

It is an amenable number.

2013011221321 is a deficient number, since it is larger than the sum of its proper divisors (3016011).

2013011221321 is an equidigital number, since it uses as much as digits as its factorization.

2013011221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016010.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2013011221321 its reverse (1231221103102), we get a palindrome (3244232324423).

The spelling of 2013011221321 in words is "two trillion, thirteen billion, eleven million, two hundred twenty-one thousand, three hundred twenty-one".