7013312220221 has 4 divisors (see below), whose sum is σ = 7035436233852. Its totient is φ = 6991188206592.

The previous prime is 7013312220193. The next prime is 7013312220241. The reversal of 7013312220221 is 1220222133107.

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 1004783707321 + 6008528512900 = 1002389^2 + 2451230^2 .

It is a cyclic number.

It is not a de Polignac number, because 7013312220221 - 2¹⁰ = 7013312219197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7013312220241) 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, 11062006340 + ... + 11062006973.

It is an arithmetic number, because the mean of its divisors is an integer number (1758859058463).

Almost surely, 2^{7013312220221} is an apocalyptic number.

It is an amenable number.

7013312220221 is a deficient number, since it is larger than the sum of its proper divisors (22124013631).

7013312220221 is a wasteful number, since it uses less digits than its factorization.

7013312220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22124013630.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 7013312220221 its reverse (1220222133107), we get a palindrome (8233534353328).

The spelling of 7013312220221 in words is "seven trillion, thirteen billion, three hundred twelve million, two hundred twenty thousand, two hundred twenty-one".